Rama writes, when discussing how to spell the various Hebrew months in a Get (Shulchan Aruch EH 136:7):

>אייר, בשני יודי"ן; ואם כתב בחד יו"ד, פסול, אם לא בשעת הדחק. ויש נמנעין ליתן גט באייר, אך במקום הדחק נותנין וכותבין בב' יודי"ן.‏  
Iyar is spelled with two Yuds. If one wrote it with one Yud, it is invalid except in pressing circumstances. Some refrain from giving a Get in Iyar [because of the doubt], but if forced to they will give a Get and spell [Iyar] with two Yuds.

The Aruch haShulchan ([bio][1]) notes (EH 126:15) the common practice near him was not to refrain from divorcing in the month of Iyar. I'm told that the [Beth Din of America][2] does arrange for divorces in the month of Iyar. I'll also note that the Mechaber (EH 126:23) rules unambiguously that Iyar is spelled with two Yuds, so there doesn't seem to be much room to be stringent in this matter for Sefardim.


  [1]: http://en.wikipedia.org/wiki/Yechiel_Michel_Epstein
  [2]: http://www.bethdin.org/jewish-divorce.asp