diff --git a/.idea/misc.xml b/.idea/misc.xml
index cc72de3..ad53516 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -24,7 +24,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/app/src/main/java/ch/pizzalink/android/activity/AddAddressActivity.java b/app/src/main/java/ch/pizzalink/android/activity/AddAddressActivity.java
index 02f53b9..1da64e7 100644
--- a/app/src/main/java/ch/pizzalink/android/activity/AddAddressActivity.java
+++ b/app/src/main/java/ch/pizzalink/android/activity/AddAddressActivity.java
@@ -47,6 +47,7 @@ public class AddAddressActivity extends BaseActivity {
     @BindString(R.string.alert_fill_all_fields) String fillAllFieldsText;
     @BindString(R.string.alert_select_country_first) String selectCountryFirstText;
     @BindString(R.string.new_address_added) String newAddressAddedText;
+    @BindString(R.string.alert_invalid_post_code) String invalidPostcodeText;
 
     private ArrayList<CityModel> cityList = new ArrayList<>();
     private ArrayList<CountryModel> countryList = new ArrayList<>();
@@ -111,6 +112,11 @@ public class AddAddressActivity extends BaseActivity {
             DialogHelper.showAlertDialog(this, fillAllFieldsText);
             return false;
         }
+
+        if(postcodePizzalinkEditText.getText().length() != 4){
+            DialogHelper.showAlertDialog(this, invalidPostcodeText);
+            return false;
+        }
         return true;
     }