diff --git a/src/main/java/no/fintlabs/model/configuration/dtos/CollectionMappingDto.java b/src/main/java/no/fintlabs/model/configuration/dtos/CollectionMappingDto.java
index 2d1f36d..e2801e5 100644
--- a/src/main/java/no/fintlabs/model/configuration/dtos/CollectionMappingDto.java
+++ b/src/main/java/no/fintlabs/model/configuration/dtos/CollectionMappingDto.java
@@ -29,4 +29,9 @@ public CollectionMappingDto(
 
     private final Collection<@Valid @NotNull FromCollectionMappingDto<T>> fromCollectionMappings;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationDto.java b/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationDto.java
index 661091d..555ab0e 100644
--- a/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationDto.java
+++ b/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationDto.java
@@ -41,4 +41,9 @@ public class ConfigurationDto {
     @NotNull
     private final ObjectMappingDto mapping;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationPatchDto.java b/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationPatchDto.java
index a94d461..4277f20 100644
--- a/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationPatchDto.java
+++ b/src/main/java/no/fintlabs/model/configuration/dtos/ConfigurationPatchDto.java
@@ -35,4 +35,9 @@ public Optional<ObjectMappingDto> getMapping() {
         return Optional.ofNullable(mapping);
     }
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/dtos/FromCollectionMappingDto.java b/src/main/java/no/fintlabs/model/configuration/dtos/FromCollectionMappingDto.java
index eb7accb..6a9a79e 100644
--- a/src/main/java/no/fintlabs/model/configuration/dtos/FromCollectionMappingDto.java
+++ b/src/main/java/no/fintlabs/model/configuration/dtos/FromCollectionMappingDto.java
@@ -31,4 +31,9 @@ public FromCollectionMappingDto(List<String> instanceCollectionReferencesOrdered
     @NotNull
     private final T elementMapping;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/dtos/ObjectMappingDto.java b/src/main/java/no/fintlabs/model/configuration/dtos/ObjectMappingDto.java
index 73dffe6..b6c0571 100644
--- a/src/main/java/no/fintlabs/model/configuration/dtos/ObjectMappingDto.java
+++ b/src/main/java/no/fintlabs/model/configuration/dtos/ObjectMappingDto.java
@@ -38,4 +38,9 @@ public ObjectMappingDto(
     private final Map<String, @Valid @NotNull ObjectMappingDto> objectMappingPerKey;
     private final Map<String, @Valid @NotNull CollectionMappingDto<ObjectMappingDto>> objectCollectionMappingPerKey;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/dtos/ValueMappingDto.java b/src/main/java/no/fintlabs/model/configuration/dtos/ValueMappingDto.java
index 00b0e0c..f82ac70 100644
--- a/src/main/java/no/fintlabs/model/configuration/dtos/ValueMappingDto.java
+++ b/src/main/java/no/fintlabs/model/configuration/dtos/ValueMappingDto.java
@@ -29,4 +29,9 @@ public class ValueMappingDto {
     @NotNull
     private final String mappingString;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/Configuration.java b/src/main/java/no/fintlabs/model/configuration/entities/Configuration.java
index 45988ec..d2bcd1b 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/Configuration.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/Configuration.java
@@ -42,4 +42,9 @@ public class Configuration {
     @NotNull
     ObjectMapping mapping;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/ObjectMapping.java b/src/main/java/no/fintlabs/model/configuration/entities/ObjectMapping.java
index bfc2a98..ab99cce 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/ObjectMapping.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/ObjectMapping.java
@@ -56,4 +56,9 @@ public class ObjectMapping {
     @MapKeyColumn(name = "key")
     private Map<String, @Valid @NotNull ObjectCollectionMapping> objectCollectionMappingPerKey;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/ValueMapping.java b/src/main/java/no/fintlabs/model/configuration/entities/ValueMapping.java
index 71fc713..ce356a1 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/ValueMapping.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/ValueMapping.java
@@ -32,4 +32,9 @@ public enum Type {
 
     private String mappingString;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/collection/InstanceCollectionReference.java b/src/main/java/no/fintlabs/model/configuration/entities/collection/InstanceCollectionReference.java
index 6a22dd0..5280d22 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/collection/InstanceCollectionReference.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/collection/InstanceCollectionReference.java
@@ -30,4 +30,9 @@ public class InstanceCollectionReference {
     @NotBlank
     private String reference;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectCollectionMapping.java b/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectCollectionMapping.java
index 64bab66..8cbd2b5 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectCollectionMapping.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectCollectionMapping.java
@@ -37,4 +37,9 @@ public class ObjectCollectionMapping {
     )
     private Collection<@Valid @NotNull ObjectsFromCollectionMapping> objectsFromCollectionMappings;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectsFromCollectionMapping.java b/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectsFromCollectionMapping.java
index 92bf015..d768fc8 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectsFromCollectionMapping.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/collection/ObjectsFromCollectionMapping.java
@@ -39,4 +39,9 @@ public class ObjectsFromCollectionMapping {
     @NotNull
     private ObjectMapping objectMapping;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/collection/ValueCollectionMapping.java b/src/main/java/no/fintlabs/model/configuration/entities/collection/ValueCollectionMapping.java
index c3ad9e7..70ac49c 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/collection/ValueCollectionMapping.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/collection/ValueCollectionMapping.java
@@ -37,4 +37,9 @@ public class ValueCollectionMapping {
     )
     private Collection<@Valid @NotNull ValuesFromCollectionMapping> valuesFromCollectionMappings;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }
diff --git a/src/main/java/no/fintlabs/model/configuration/entities/collection/ValuesFromCollectionMapping.java b/src/main/java/no/fintlabs/model/configuration/entities/collection/ValuesFromCollectionMapping.java
index 549649e..fcd1212 100644
--- a/src/main/java/no/fintlabs/model/configuration/entities/collection/ValuesFromCollectionMapping.java
+++ b/src/main/java/no/fintlabs/model/configuration/entities/collection/ValuesFromCollectionMapping.java
@@ -40,4 +40,9 @@ public class ValuesFromCollectionMapping {
     @NotNull
     private ValueMapping valueMapping;
 
+    @Override
+    public String toString() {
+        return "Sensitive data omitted";
+    }
+
 }