Just received this
http://www.yellali.com/news/article/109/update-on-residence-permit-processes from Yell Ali.
‘120 day rule’
"According to Article 33 paragraph c of Law 6458 ‘Under the following cases a short-term residence permit shall not be granted, shall be cancelled if has been issued, and shall not be renewed when:
c) [the foreigner] lived outside of Turkey for longer than one hundred and twenty days in total during the preceding year’
This rule is now being applied to both short term residence permits issued after April 2014 (new style card) and those issued prior to April 2014 (old blue book style).
If you are out of Turkey for more than 120 days in the previous 12 month period your residence permit will be cancelled on re-entry to Turkey and you must obtain either an e-Visa, or visa on arrival, to cover your stay until you wish to reapply for a residence permit.
You will be able to apply for a new residence permit immediately following cancellation of your existing one.
We have been made aware that there are inconsistencies in application of this rule dependant on the port of entry-this information has been passed to the DGMM."
If I've read it correctly our RP will be cancelled when we return in October as we will have been out of Turkey for more than 120 daqys. Entering with a 90 visa we should be able to get a RP for a year.
Don