Index: Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/SerializableAssessmentProcess.cs
===================================================================
diff -u -ra30b67748bed77736f62b6b3c30c82649bb9cf4e -r1815be6776a818b0d390819ca63f89d3c5b78063
--- Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/SerializableAssessmentProcess.cs	(.../SerializableAssessmentProcess.cs)	(revision a30b67748bed77736f62b6b3c30c82649bb9cf4e)
+++ Ringtoets/AssemblyTool/src/Ringtoets.AssemblyTool.IO/Model/SerializableAssessmentProcess.cs	(.../SerializableAssessmentProcess.cs)	(revision 1815be6776a818b0d390819ca63f89d3c5b78063)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Xml.Serialization;
+using Ringtoets.AssemblyTool.IO.Model.Helpers;
 
 namespace Ringtoets.AssemblyTool.IO.Model
 {
@@ -44,14 +45,14 @@
         /// </summary>
         /// <param name="id">The unique ID of the assessment process.</param>
         /// <param name="assessmentSection">The assessment section this process belongs to.</param>
-        /// <exception cref="ArgumentException">Thrown when <paramref name="id"/> is <c>null</c> or empty.</exception>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="assessmentSection"/> is <c>null</c>.</exception>
+        /// <exception cref="ArgumentNullException">Thrown when any parameter is <c>null</c>.</exception>
+        /// <exception cref="ArgumentException">Thrown when <paramref name="id"/> is invalid.</exception>
         public SerializableAssessmentProcess(string id,
                                              SerializableAssessmentSection assessmentSection) : this()
         {
-            if (string.IsNullOrEmpty(id))
+            if (!IdValidator.Validate(id))
             {
-                throw new ArgumentException($@"'{nameof(id)}' must have a value.");
+                throw new ArgumentException($@"'{nameof(id)}' must have a value and consist only of alphanumerical characters, '-', '_' or '.'.");
             }
 
             if (assessmentSection == null)