Have you ever found it frustrating that you can never reuse an 
AdGroup name after removing the 
AdGroup, since a removed 
AdGroup cannot be modified? We have awesome news for you!
Now, 
AdGroupService doesn’t consider 
REMOVED AdGroup names when verifying that an 
AdGroup name is unique within a 
Campaign. If an 
AdGroup is in a 
REMOVED state, then the name of that 
AdGroup can be reused. This is already the case for Campaigns, and we’ve extended this relaxation of constraints to 
AdGroups.
If you have questions or need clarification, visit us on the 
AdWords API Forum or our 
Google+ page.
 Nadine Sundquist, AdWords API Team
 Nadine Sundquist, AdWords API Team