If the terms they've applied for were approved, there is no need to send an AAN and (in my opinion) you're giving examiners one more thing to pick on.
Last edited by Eldon96; 10/13/11 07:09 PM.
However, if even the smallest detail of the original terms were not approved and they did not expressly accept your counter offer then an AAN is warranted.
An application is either;
Incomplete (which requires written notice within 30 days) or;
Denied (which requires written notice within 30 days) or;
Counteroffered (Written AAN is still required if not closed within 90 days) or;
Accepted on all terms and conditions applied for (this is the only one that does not require written notification if not closed)
If you do mark an application as withdrawn, MyScamper is correct, document, document, document.