diff --git a/api/material.yaml b/api/material.yaml
index d184a3f..967071c 100644
--- a/api/material.yaml
+++ b/api/material.yaml
@@ -48,7 +48,7 @@
   get:
     summary: get material details
     description: 'Auth: all, levels: read, write, maintain, dev, admin'
-    x-doc: status handling (accessible (only for maintain/admin))?  # TODO after decision
+    x-doc: deleted samples are available only for maintain/admin
     tags:
       - /material
     responses:
@@ -67,7 +67,7 @@
   put:
     summary: change material
     description: 'Auth: basic, levels: write, maintain, dev, admin'
-    x-doc: status is reset to 0 on any changes
+    x-doc: status is reset to 0 on any changes, deleted samples cannot be changed
     tags:
       - /material
     security:
@@ -117,6 +117,29 @@
       500:
         $ref: 'api.yaml#/components/responses/500'
 
+/material/restore/{id}:
+  parameters:
+    - $ref: 'api.yaml#/components/parameters/Id'
+  put:
+    summary: restore material
+    description: 'Auth: basic, levels: maintain, admin'
+    x-doc: status is set to 0
+    tags:
+      - /material
+    security:
+      - BasicAuth: []
+    responses:
+      200:
+        $ref: 'api.yaml#/components/responses/Ok'
+      401:
+        $ref: 'api.yaml#/components/responses/401'
+      403:
+        $ref: 'api.yaml#/components/responses/403'
+      404:
+        $ref: 'api.yaml#/components/responses/404'
+      500:
+        $ref: 'api.yaml#/components/responses/500'
+
 /material/new:
   post:
     summary: add material
diff --git a/api/measurement.yaml b/api/measurement.yaml
index 298b04e..3068d97 100644
--- a/api/measurement.yaml
+++ b/api/measurement.yaml
@@ -4,7 +4,7 @@
   get:
     summary: measurement values by id
     description: 'Auth: all, levels: read, write, maintain, dev, admin'
-    x-doc: status handling (accessible (only for maintain/admin))?  # TODO after decision
+    x-doc: deleted samples are available only for maintain/admin
     tags:
       - /measurement
     responses:
@@ -25,7 +25,7 @@
   put:
     summary: change measurement
     description: 'Auth: basic, levels: write, maintain, dev, admin'
-    x-doc: status is reset to 0 on any changes
+    x-doc: status is reset to 0 on any changes, deleted measurements cannot be edited
     tags:
       - /measurement
     security:
@@ -77,6 +77,29 @@
       500:
         $ref: 'api.yaml#/components/responses/500'
 
+/measurement/restore/{id}:
+  parameters:
+    - $ref: 'api.yaml#/components/parameters/Id'
+  put:
+    summary: restore measurement
+    description: 'Auth: basic, levels: maintain, admin'
+    x-doc: status is set to 0
+    tags:
+      - /measurement
+    security:
+      - BasicAuth: []
+    responses:
+      200:
+        $ref: 'api.yaml#/components/responses/Ok'
+      401:
+        $ref: 'api.yaml#/components/responses/401'
+      403:
+        $ref: 'api.yaml#/components/responses/403'
+      404:
+        $ref: 'api.yaml#/components/responses/404'
+      500:
+        $ref: 'api.yaml#/components/responses/500'
+
 /measurement/new:
   post:
     summary: add measurement
diff --git a/api/sample.yaml b/api/sample.yaml
index 9e830ff..67f25ac 100644
--- a/api/sample.yaml
+++ b/api/sample.yaml
@@ -69,7 +69,7 @@
   put:
     summary: change sample
     description: 'Auth: basic, levels: write, maintain, dev, admin <br>Only maintain and admin are allowed to edit samples created by another user'
-    x-doc: status is reset to 0 on any changes
+    x-doc: status is reset to 0 on any changes, deleted samples cannot be changed
     tags:
       - /sample
     security:
@@ -119,6 +119,29 @@
       500:
         $ref: 'api.yaml#/components/responses/500'
 
+/sample/restore/{id}:
+  parameters:
+    - $ref: 'api.yaml#/components/parameters/Id'
+  put:
+    summary: restore sample
+    description: 'Auth: basic, levels: maintain, admin'
+    x-doc: status is set to 0
+    tags:
+      - /sample
+    security:
+      - BasicAuth: []
+    responses:
+      200:
+        $ref: 'api.yaml#/components/responses/Ok'
+      401:
+        $ref: 'api.yaml#/components/responses/401'
+      403:
+        $ref: 'api.yaml#/components/responses/403'
+      404:
+        $ref: 'api.yaml#/components/responses/404'
+      500:
+        $ref: 'api.yaml#/components/responses/500'
+
 /sample/new:
   post:
     summary: add sample
diff --git a/src/index.ts b/src/index.ts
index 0de6ff4..7dda199 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -14,6 +14,7 @@ import db from './db';
 // TODO: coverage
 // TODO: think about the display of deleted/new samples and validation in data and UI
 // TODO: improve error coverage
+// TODO: guess properties from material name in UI
 
 // tell if server is running in debug or production environment
 console.info(process.env.NODE_ENV === 'production' ? '===== PRODUCTION =====' : process.env.NODE_ENV === 'test' ? '' :'===== DEVELOPMENT =====');
diff --git a/src/routes/material.spec.ts b/src/routes/material.spec.ts
index ae8d305..56f094e 100644
--- a/src/routes/material.spec.ts
+++ b/src/routes/material.spec.ts
@@ -202,6 +202,23 @@ describe('/material', () => {
         res: {_id: '100000000000000000000007', name: 'Ultramid A4H', supplier: 'BASF', group: 'PA66', mineral: 0, glass_fiber: 0, carbon_fiber: 0, numbers: [{color: 'black', number: ''}]}
       });
     });
+    it('returns a deleted material for a maintain/admin user', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/material/100000000000000000000008',
+        auth: {basic: 'admin'},
+        httpStatus: 200,
+        res: {_id: '100000000000000000000008', name: 'Latamid 66 H 2 G 30', supplier: 'LATI', group: 'PA66', mineral: 0, glass_fiber: 30, carbon_fiber: 0, numbers: [{color: 'blue', number: '5513943509'}]}
+      });
+    });
+    it('returns 403 for a write user when requesting a deleted material', done => {
+      TestHelper.request(server, done, {
+        method: 'get',
+        url: '/material/100000000000000000000008',
+        auth: {basic: 'janedoe'},
+        httpStatus: 403
+      });
+    });
     it('rejects an invalid id', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -361,6 +378,15 @@ describe('/material', () => {
         req: {},
       });
     });
+    it('rejects editing a deleted material', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/material/100000000000000000000008',
+        auth: {basic: 'janedoe'},
+        httpStatus: 403,
+        req: {}
+      });
+    });
     it('rejects an API key', done => {
       TestHelper.request(server, done, {
         method: 'put',
@@ -468,6 +494,61 @@ describe('/material', () => {
     });
   });
 
+  describe('PUT /material/restore/{id}', () => {
+    it('sets the status', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/material/restore/100000000000000000000008',
+        auth: {basic: 'admin'},
+        httpStatus: 200,
+        req: {}
+      }).end((err, res) => {
+        if (err) return done (err);
+        should(res.body).be.eql({status: 'OK'});
+        MaterialModel.findById('100000000000000000000008').lean().exec((err, data: any) => {
+          if (err) return done(err);
+          should(data).have.property('status',globals.status.new);
+          done();
+        });
+      });
+    });
+    it('rejects an API key', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/material/restore/100000000000000000000008',
+        auth: {key: 'admin'},
+        httpStatus: 401,
+        req: {}
+      });
+    });
+    it('rejects a write user', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/material/restore/100000000000000000000008',
+        auth: {basic: 'janedoe'},
+        httpStatus: 403,
+        req: {}
+      });
+    });
+    it('returns 404 for an unknown sample', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/material/restore/000000000000000000000008',
+        auth: {basic: 'admin'},
+        httpStatus: 404,
+        req: {}
+      });
+    });
+    it('rejects unauthorized requests', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/material/restore/100000000000000000000008',
+        httpStatus: 401,
+        req: {}
+      });
+    });
+  });
+
   describe('POST /material/new', () => {
     it('returns the right material', done => {
       TestHelper.request(server, done, {
diff --git a/src/routes/material.ts b/src/routes/material.ts
index 4a1adb8..1711eb5 100644
--- a/src/routes/material.ts
+++ b/src/routes/material.ts
@@ -34,14 +34,14 @@ router.get('/materials/:group(new|deleted)', (req, res, next) => {
 router.get('/material/' + IdValidate.parameter(), (req, res, next) => {
   if (!req.auth(res, ['read', 'write', 'maintain', 'dev', 'admin'], 'all')) return;
 
-  MaterialModel.findById(req.params.id).lean().exec((err, data) => {
+  MaterialModel.findById(req.params.id).lean().exec((err, data: any) => {
     if (err) return next(err);
-    if (data) {
-      res.json(MaterialValidate.output(data));
-    }
-    else {
-      res.status(404).json({status: 'Not found'});
+
+    if (!data) {
+      return res.status(404).json({status: 'Not found'});
     }
+    if (data.status === globals.status.deleted && !req.auth(res, ['maintain', 'admin'], 'all')) return;  // deleted materials only available for maintain/admin
+    res.json(MaterialValidate.output(data));
   });
 });
 
@@ -55,6 +55,9 @@ router.put('/material/' + IdValidate.parameter(), (req, res, next) => {
     if (!materialData) {
       return res.status(404).json({status: 'Not found'});
     }
+    if (materialData.status === globals.status.deleted) {
+      return res.status(403).json({status: 'Forbidden'});
+    }
     if (material.hasOwnProperty('name') && material.name !== materialData.name) {
       if (!await nameCheck(material, res, next)) return;
     }
@@ -92,6 +95,19 @@ router.delete('/material/' + IdValidate.parameter(), (req, res, next) => {
   });
 });
 
+router.put('/material/restore/' + IdValidate.parameter(), (req, res, next) => {
+  if (!req.auth(res, ['maintain', 'admin'], 'basic')) return;
+
+  MaterialModel.findByIdAndUpdate(req.params.id, {status: globals.status.new}).lean().exec((err, data) => {
+    if (err) return next(err);
+
+    if (!data) {
+      return res.status(404).json({status: 'Not found'});
+    }
+    res.json({status: 'OK'});
+  });
+});
+
 router.post('/material/new', async (req, res, next) => {
   if (!req.auth(res, ['write', 'maintain', 'dev', 'admin'], 'basic')) return;
 
diff --git a/src/routes/measurement.spec.ts b/src/routes/measurement.spec.ts
index 5af91a3..c27bf63 100644
--- a/src/routes/measurement.spec.ts
+++ b/src/routes/measurement.spec.ts
@@ -3,8 +3,6 @@ import MeasurementModel from '../models/measurement';
 import TestHelper from "../test/helper";
 import globals from '../globals';
 
-// TODO: restore measurements for m/a
-
 
 describe('/measurement', () => {
   let server;
@@ -255,6 +253,15 @@ describe('/measurement', () => {
         httpStatus: 404
       });
     });
+    it('rejects editing a deleted measurement', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/measurement/800000000000000000000004',
+        auth: {basic: 'admin'},
+        httpStatus: 403,
+        req: {}
+      });
+    });
     it('rejects an API key', done => {
       TestHelper.request(server, done, {
         method: 'put',
@@ -358,6 +365,61 @@ describe('/measurement', () => {
     });
   });
 
+  describe('PUT /measurement/restore/{id}', () => {
+    it('sets the status', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/measurement/restore/800000000000000000000004',
+        auth: {basic: 'admin'},
+        httpStatus: 200,
+        req: {}
+      }).end((err, res) => {
+        if (err) return done (err);
+        should(res.body).be.eql({status: 'OK'});
+        MeasurementModel.findById('800000000000000000000004').lean().exec((err, data: any) => {
+          if (err) return done(err);
+          should(data).have.property('status',globals.status.new);
+          done();
+        });
+      });
+    });
+    it('rejects an API key', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/measurement/restore/800000000000000000000004',
+        auth: {key: 'admin'},
+        httpStatus: 401,
+        req: {}
+      });
+    });
+    it('rejects a write user', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/measurement/restore/800000000000000000000004',
+        auth: {basic: 'janedoe'},
+        httpStatus: 403,
+        req: {}
+      });
+    });
+    it('returns 404 for an unknown sample', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/measurement/restore/000000000000000000000004',
+        auth: {basic: 'admin'},
+        httpStatus: 404,
+        req: {}
+      });
+    });
+    it('rejects unauthorized requests', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/measurement/restore/800000000000000000000004',
+        httpStatus: 401,
+        req: {}
+      });
+    });
+  });
+
   describe('POST /measurement/new', () => {
     it('returns the right measurement', done => {
       TestHelper.request(server, done, {
diff --git a/src/routes/measurement.ts b/src/routes/measurement.ts
index 0d0f0f6..e7f6271 100644
--- a/src/routes/measurement.ts
+++ b/src/routes/measurement.ts
@@ -38,6 +38,9 @@ router.put('/measurement/' + IdValidate.parameter(), async (req, res, next) => {
   if (!data) {
     return res.status(404).json({status: 'Not found'});
   }
+  if (data.status === globals.status.deleted) {
+    return res.status(403).json({status: 'Forbidden'});
+  }
 
   // add properties needed for sampleIdCheck
   measurement.measurement_template = data.measurement_template;
@@ -75,6 +78,19 @@ router.delete('/measurement/' + IdValidate.parameter(), (req, res, next) => {
   });
 });
 
+router.put('/measurement/restore/' + IdValidate.parameter(), (req, res, next) => {
+  if (!req.auth(res, ['maintain', 'admin'], 'basic')) return;
+
+  MeasurementModel.findByIdAndUpdate(req.params.id, {status: globals.status.new}).lean().exec((err, data) => {
+    if (err) return next(err);
+
+    if (!data) {
+      return res.status(404).json({status: 'Not found'});
+    }
+    res.json({status: 'OK'});
+  });
+});
+
 router.post('/measurement/new', async (req, res, next) => {
   if (!req.auth(res, ['write', 'maintain', 'dev', 'admin'], 'basic')) return;
 
diff --git a/src/routes/sample.spec.ts b/src/routes/sample.spec.ts
index cfeeb7c..b90a722 100644
--- a/src/routes/sample.spec.ts
+++ b/src/routes/sample.spec.ts
@@ -2,15 +2,16 @@ import should from 'should/as-function';
 import SampleModel from '../models/sample';
 import NoteModel from '../models/note';
 import NoteFieldModel from '../models/note_field';
+import MeasurementModel from '../models/measurement';
 import TestHelper from "../test/helper";
 import globals from '../globals';
+import mongoose from 'mongoose';
 
 // TODO: generate output for ML in format DPT -> data, implement filtering, field selection
+// TODO: generate csv
 // TODO: filter by not completely filled/no measurements
 // TODO: write script for data import
-// TODO: delete everything (measurements, condition) with sample
 // TODO: allow adding sample numbers for existing samples
-
 // TODO: Do not allow validation or measurement entry without condition
 
 
@@ -187,7 +188,6 @@ describe('/sample', () => {
         res: {_id: '400000000000000000000003', number: '33', type: 'part', color: 'black', batch: '1704-005', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material: {_id: '100000000000000000000005', name: 'Amodel A 1133 HS', supplier: 'Solvay', group: 'PPA', mineral: 0, glass_fiber: 33, carbon_fiber: 0, numbers: [{color: 'black', number: '5514262406'}]}, notes: {comment: '', sample_references: [{sample_id: '400000000000000000000004', relation: 'granulate to sample'}], custom_fields: {'not allowed for new applications': true}}, user: 'admin'}
       });
     });
-
     it('works with an API key', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -197,7 +197,6 @@ describe('/sample', () => {
         res: {_id: '400000000000000000000003', number: '33', type: 'part', color: 'black', batch: '1704-005', condition: {material: 'copper', weeks: 3, condition_template: '200000000000000000000001'}, material: {_id: '100000000000000000000005', name: 'Amodel A 1133 HS', supplier: 'Solvay', group: 'PPA', mineral: 0, glass_fiber: 33, carbon_fiber: 0, numbers: [{color: 'black', number: '5514262406'}]}, notes: {comment: '', sample_references: [{sample_id: '400000000000000000000004', relation: 'granulate to sample'}], custom_fields: {'not allowed for new applications': true}}, user: 'admin'}
       });
     });
-
     it('returns a deleted sample for a maintain/admin user', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -207,7 +206,6 @@ describe('/sample', () => {
         res: {_id: '400000000000000000000005', number: 'Rng33', type: 'granulate', color: 'black', batch: '1653000308', condition: {condition_template: '200000000000000000000003'}, material: {_id: '100000000000000000000005', name: 'Amodel A 1133 HS', supplier: 'Solvay', group: 'PPA', mineral: 0, glass_fiber: 33, carbon_fiber: 0, numbers: [{color: 'black', number: '5514262406'}]}, notes: {}, user: 'admin'}
       });
     });
-
     it('returns 403 for a write user when requesting a deleted sample', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -216,7 +214,6 @@ describe('/sample', () => {
         httpStatus: 403
       });
     });
-
     it('returns 404 for an unknown sample', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -225,7 +222,6 @@ describe('/sample', () => {
         httpStatus: 404
       });
     });
-
     it('rejects an invalid id', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -234,7 +230,6 @@ describe('/sample', () => {
         httpStatus: 404
       });
     });
-
     it('rejects unauthorized requests', done => {
       TestHelper.request(server, done, {
         method: 'get',
@@ -589,6 +584,15 @@ describe('/sample', () => {
         res: {status: 'Condition template not available'}
       });
     });
+    it('rejects editing a deleted sample', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/sample/400000000000000000000005',
+        auth: {basic: 'admin'},
+        httpStatus: 403,
+        req: {}
+      });
+    });
     it('rejects an API key', done => {
       TestHelper.request(server, done, {
         method: 'put',
@@ -749,6 +753,24 @@ describe('/sample', () => {
         });
       });
     });
+    it('deletes associated measurements', done => {
+      TestHelper.request(server, done, {
+        method: 'delete',
+        url: '/sample/400000000000000000000001',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body).be.eql({status: 'OK'});
+        MeasurementModel.find({sample_id: mongoose.Types.ObjectId('400000000000000000000001')}).lean().exec((err, data: any) => {
+          if (err) return done(err);
+          should(data).matchEach(sample => {
+            should(sample).have.property('status', -1);
+          });
+          done();
+        });
+      });
+    });
     it('rejects deleting samples of other users for write users', done => {
       TestHelper.request(server, done, {
         method: 'delete',
@@ -765,7 +787,6 @@ describe('/sample', () => {
         httpStatus: 404
       });
     });
-    it('rejects deleting a sample referenced by conditions');  // TODO after decision
     it('rejects requests from a read user', done => {
       TestHelper.request(server, done, {
         method: 'delete',
@@ -799,6 +820,61 @@ describe('/sample', () => {
     });
   });
 
+  describe('PUT /sample/restore/{id}', () => {
+    it('sets the status', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/sample/restore/400000000000000000000005',
+        auth: {basic: 'admin'},
+        httpStatus: 200,
+        req: {}
+      }).end((err, res) => {
+        if (err) return done (err);
+        should(res.body).be.eql({status: 'OK'});
+        SampleModel.findById('400000000000000000000005').lean().exec((err, data: any) => {
+          if (err) return done(err);
+          should(data).have.property('status',globals.status.new);
+          done();
+        });
+      });
+    });
+    it('rejects an API key', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/sample/restore/400000000000000000000005',
+        auth: {key: 'admin'},
+        httpStatus: 401,
+        req: {}
+      });
+    });
+    it('rejects a write user', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/sample/restore/400000000000000000000005',
+        auth: {basic: 'janedoe'},
+        httpStatus: 403,
+        req: {}
+      });
+    });
+    it('returns 404 for an unknown sample', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/sample/restore/000000000000000000000005',
+        auth: {basic: 'admin'},
+        httpStatus: 404,
+        req: {}
+      });
+    });
+    it('rejects unauthorized requests', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/sample/restore/400000000000000000000005',
+        httpStatus: 401,
+        req: {}
+      });
+    });
+  });
+
   describe('POST /sample/new', () => {
     it('returns the right sample', done => {
       TestHelper.request(server, done, {
diff --git a/src/routes/sample.ts b/src/routes/sample.ts
index ed1afb3..e8ed1f7 100644
--- a/src/routes/sample.ts
+++ b/src/routes/sample.ts
@@ -10,7 +10,7 @@ import MaterialModel from '../models/material';
 import NoteModel from '../models/note';
 import NoteFieldModel from '../models/note_field';
 import IdValidate from './validate/id';
-import mongoose from "mongoose";
+import mongoose from 'mongoose';
 import ConditionTemplateModel from '../models/condition_template';
 import ParametersValidate from './validate/parameters';
 import globals from '../globals';
@@ -43,7 +43,7 @@ router.get('/sample/' + IdValidate.parameter(), (req, res, next) => {
     if (err) return next(err);
 
     if (sampleData) {
-      if (sampleData.status ===globals.status.deleted && !req.auth(res, ['maintain', 'admin'], 'all')) return;  // deleted samples only available for maintain/admin
+      if (sampleData.status === globals.status.deleted && !req.auth(res, ['maintain', 'admin'], 'all')) return;  // deleted samples only available for maintain/admin
       sampleData.material = sampleData.material_id;  // map data to right keys
       sampleData.user = sampleData.user_id.name;
       sampleData.notes = sampleData.note_id ? sampleData.note_id : {};
@@ -69,6 +69,9 @@ router.put('/sample/' + IdValidate.parameter(), (req, res, next) => {
     if (!sampleData) {
       return res.status(404).json({status: 'Not found'});
     }
+    if (sampleData.status === globals.status.deleted) {
+      return res.status(403).json({status: 'Forbidden'});
+    }
 
     // only maintain and admin are allowed to edit other user's data
     if (sampleData.user_id.toString() !== req.authDetails.id && !req.auth(res, ['maintain', 'admin'], 'basic')) return;
@@ -138,22 +141,41 @@ router.delete('/sample/' + IdValidate.parameter(), (req, res, next) => {
 
     await SampleModel.findByIdAndUpdate(req.params.id, {status:globals.status.deleted}).lean().exec(err => {  // set sample status
       if (err) return next(err);
-      if (sampleData.note_id !== null) {  // handle notes
-        NoteModel.findById(sampleData.note_id).lean().exec((err, data: any) => {  // find notes to update note_fields
-          if (err) return next(err);
-          if (data.hasOwnProperty('custom_fields')) {  // update note_fields
-            customFieldsChange(Object.keys(data.custom_fields), -1);
-          }
+
+      // set status of associated measurements also to deleted
+      MeasurementModel.update({sample_id: mongoose.Types.ObjectId(req.params.id)}, {status: -1}).lean().exec(err => {
+        if (err) return next(err);
+
+        if (sampleData.note_id !== null) {  // handle notes
+          NoteModel.findById(sampleData.note_id).lean().exec((err, data: any) => {  // find notes to update note_fields
+            if (err) return next(err);
+            if (data.hasOwnProperty('custom_fields')) {  // update note_fields
+              customFieldsChange(Object.keys(data.custom_fields), -1);
+            }
+            res.json({status: 'OK'});
+          });
+        }
+        else {
           res.json({status: 'OK'});
-        });
-      }
-      else {
-        res.json({status: 'OK'});
-      }
+        }
+      });
     });
   });
 });
 
+router.put('/sample/restore/' + IdValidate.parameter(), (req, res, next) => {
+  if (!req.auth(res, ['maintain', 'admin'], 'basic')) return;
+
+  SampleModel.findByIdAndUpdate(req.params.id, {status: globals.status.new}).lean().exec((err, data) => {
+    if (err) return next(err);
+
+    if (!data) {
+      return res.status(404).json({status: 'Not found'});
+    }
+    res.json({status: 'OK'});
+  });
+});
+
 router.post('/sample/new', async (req, res, next) => {
   if (!req.auth(res, ['write', 'maintain', 'dev', 'admin'], 'basic')) return;
 
diff --git a/src/test/db.json b/src/test/db.json
index 372b09a..de4070f 100644
--- a/src/test/db.json
+++ b/src/test/db.json
@@ -268,6 +268,23 @@
         ],
         "status": 0,
         "__v": 0
+      },
+      {
+        "_id": {"$oid":"100000000000000000000008"},
+        "name": "Latamid 66 H 2 G 30",
+        "supplier": "LATI",
+        "group": "PA66",
+        "mineral": 0,
+        "glass_fiber": 30,
+        "carbon_fiber": 0,
+        "numbers": [
+          {
+            "color": "blue",
+            "number": "5513943509"
+          }
+        ],
+        "status": -1,
+        "__v": 0
       }
     ],
     "measurements": [