diff --git a/src/main/java/envoy/data/Contacts.java b/src/main/java/envoy/data/Contacts.java
index bd19102..c86c1fc 100644
--- a/src/main/java/envoy/data/Contacts.java
+++ b/src/main/java/envoy/data/Contacts.java
@@ -7,38 +7,27 @@ import java.util.List;
  * Project: <strong>envoy-common</strong><br>
  * File: <strong>Contacts.java</strong><br>
  * Created: <strong>02.01.2020</strong><br>
- * 
+ *
  * @author Kai S. K. Engelbart
  * @since Envoy Common v0.2-alpha
  */
 public class Contacts implements Serializable {
 
-	private final long			userId;
-	private final List<User>	contacts;
+	private final List<User> contacts;
 
 	private static final long serialVersionUID = 136970804968152871L;
 
 	/**
 	 * Creates an instance of {@link Contacts}.
 	 *
-	 * @param userId   the ID of the user this contacts belong to
 	 * @param contacts the contact list
 	 * @since Envoy Common v0.2-alpha
 	 */
-	public Contacts(long userId, List<User> contacts) {
-		this.userId		= userId;
-		this.contacts	= contacts;
-	}
+	public Contacts(List<User> contacts) { this.contacts = contacts; }
 
 	@Override
 	public String toString() { return String.format("Contacts[%s]", contacts); }
 
-	/**
-	 * @return the ID of the user this contacts belong to
-	 * @since Envoy Common v0.2-alpha
-	 */
-	public long getUserId() { return userId; }
-
 	/**
 	 * @return a list of users messages can be sent to
 	 * @since Envoy Common v0.2-alpha
diff --git a/src/main/java/envoy/event/ContactOperationEvent.java b/src/main/java/envoy/event/ContactOperationEvent.java
new file mode 100644
index 0000000..643e04b
--- /dev/null
+++ b/src/main/java/envoy/event/ContactOperationEvent.java
@@ -0,0 +1,69 @@
+package envoy.event;
+
+import envoy.data.User;
+
+/**
+ * Signifies the modification of a contact list.<br>
+ * <br>
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>ContactOperationEvent.java</strong><br>
+ * Created: <strong>05.02.2020</strong><br>
+ *
+ * @author Maximilian K&auml;fer
+ * @since Envoy Common v0.2-alpha
+ */
+public class ContactOperationEvent implements Event<User> {
+
+	/**
+	 * Specifies the operation performed on a contact list.<br>
+	 * <br>
+	 * Project: <strong>envoy-common</strong><br>
+	 * File: <strong>ContactOperationEvent.java</strong><br>
+	 * Created: <strong>05.02.2020</strong><br>
+	 *
+	 * @author Maximilian K&auml;fer
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public enum Operation {
+
+		/**
+		 * Adds a user to the contact list.
+		 */
+		ADD,
+
+		/**
+		 * Removes a user from the contact list.
+		 */
+		REMOVE;
+	}
+
+	private final User		contact;
+	private final Operation	operationType;
+
+	private static final long serialVersionUID = -1166652868189511553L;
+
+	/**
+	 * Initializes a {@link ContactOperationEvent}.
+	 *
+	 * @param contact       the user on which the operation is performed
+	 * @param operationType the type of operation to perform
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public ContactOperationEvent(User contact, Operation operationType) {
+		this.contact		= contact;
+		this.operationType	= operationType;
+	}
+
+	/**
+	 * @return the user to perform an operation on
+	 * @since Envoy Common v0.2-alpha
+	 */
+	@Override
+	public User get() { return contact; }
+
+	/**
+	 * @return the type of operation to perform
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public Operation getOperationType() { return operationType; }
+}
diff --git a/src/main/java/envoy/event/ContactSearchRequest.java b/src/main/java/envoy/event/ContactSearchRequest.java
new file mode 100644
index 0000000..701c1dc
--- /dev/null
+++ b/src/main/java/envoy/event/ContactSearchRequest.java
@@ -0,0 +1,33 @@
+package envoy.event;
+
+/**
+ * Requests a contact search from the server.<br>
+ * <br>
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>ContactSearchRequest.java</strong><br>
+ * Created: <strong>05.02.2020</strong><br>
+ *
+ * @author Maximilian K&auml;fer
+ * @since Envoy Common v0.2-alpha
+ */
+public class ContactSearchRequest implements Event<String> {
+
+	private final String searchPhrase;
+
+	private static final long serialVersionUID = -7969312055630533627L;
+
+	/**
+	 * Initializes a {@link ContactSearchRequest}.
+	 *
+	 * @param searchPhrase the search phrase to use in the contact search
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public ContactSearchRequest(String searchPhrase) { this.searchPhrase = searchPhrase; }
+
+	/**
+	 * @return the search phrase
+	 * @since Envoy Common v0.2-alpha
+	 */
+	@Override
+	public String get() { return searchPhrase; }
+}