diff --git a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/basic/SimplePersonRenderer.java b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/basic/SimplePersonRenderer.java
index f5d5930c8590e70df20e2071636021f2187f5fbd..65d041ae25facabff881dcde6ca9b4fc0b770f5c 100644
--- a/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/basic/SimplePersonRenderer.java
+++ b/openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/basic/SimplePersonRenderer.java
@@ -30,6 +30,7 @@ public class SimplePersonRenderer
         {
             final String lastName = person.getLastName();
             final String firstName = person.getFirstName();
+            final String userId = person.getUserId();
             if (isBlank(lastName) == false)
             {
                 builder.append(lastName);
@@ -42,6 +43,9 @@ public class SimplePersonRenderer
                 }
                 builder.append(firstName);
             }
+            if(isBlank(lastName) && isBlank(firstName)) {
+            	builder.append(userId);
+            }
         }
         return builder;
     }