diff --git a/entity/Address_entity/Address_entity.aod b/entity/Address_entity/Address_entity.aod
index 4fa663250bca6df6a05c342da3881c282e87c1c1..1cfe28c6019782ac295bace24ef002e4a268a69c 100644
--- a/entity/Address_entity/Address_entity.aod
+++ b/entity/Address_entity/Address_entity.aod
@@ -15,6 +15,7 @@
       <mandatory v="true" />
       <textInputAllowed v="false" />
       <stateProcess>%aditoprj%/entity/Address_entity/entityfields/address/stateProcess.js</stateProcess>
+      <titleProcess>%aditoprj%/entity/Address_entity/entityfields/address/titleProcess.js</titleProcess>
       <tooltip></tooltip>
       <onValueChange>%aditoprj%/entity/Address_entity/entityfields/address/onValueChange.js</onValueChange>
       <onValueChangeTypes>
diff --git a/entity/Address_entity/entityfields/address/titleProcess.js b/entity/Address_entity/entityfields/address/titleProcess.js
new file mode 100644
index 0000000000000000000000000000000000000000..ad0fa3728f7bedc3ab9024fd4ef0eddd9195e6f0
--- /dev/null
+++ b/entity/Address_entity/entityfields/address/titleProcess.js
@@ -0,0 +1,10 @@
+import("system.result");
+import("system.vars");
+import("KeywordRegistry_basic");
+import("Keyword_lib");
+
+var key = vars.get("$field.ADDR_TYPE");
+if (key == $KeywordRegistry.addressType$post())
+{
+    result.string("Post office box number");
+}
diff --git a/entity/Address_entity/entityfields/buildingno/stateProcess.js b/entity/Address_entity/entityfields/buildingno/stateProcess.js
index ed5e161dcc793ca6dc3a379eea6d6b3445eb3b3c..433311c2893f6328bab6780c878efe20064f989c 100644
--- a/entity/Address_entity/entityfields/buildingno/stateProcess.js
+++ b/entity/Address_entity/entityfields/buildingno/stateProcess.js
@@ -1,10 +1,12 @@
+import("KeywordRegistry_basic");
 import("system.neon");
 import("system.result");
 import("system.vars");
 
+var key = vars.get("$field.ADDR_TYPE");
 // The field is only displayed in edit mode because there is the "formattedAddress" field which one shows the fromated address.
 // If the field has a Value it would be displayed next to the formattedAddress field in view mode, so in this case the state is set to invisible.
-if (vars.get("$sys.recordstate") == "" || vars.get("$sys.recordstate") == neon.OPERATINGSTATE_VIEW)
+if (vars.get("$sys.recordstate") == "" || vars.get("$sys.recordstate") == neon.OPERATINGSTATE_VIEW || key == $KeywordRegistry.addressType$post())
 {
     result.string(neon.COMPONENTSTATE_INVISIBLE);
 }
\ No newline at end of file