Dear …
RE: Job Offer - __(Name of Position)__ - Rescinded
It is with regret that we must inform you that __(Name of Organization)__ has rescinded the job offer made to you on __(date)__ for __(type of position)__. This decision was made due to the following reason(s):
__(Briefly state reason – example: your acceptance of the offer did not reach us in a timely fashion/the conditions contained in the offer were not met/our reference check revealed unfavorable information/etc.)__.
It is not common practice for __(Name of Organization)__ to rescind job offers, but in light of __(the/this/these new/etc.)__ circumstance(s), we were left with no other alternative. It is an unfortunate outcome for all parties concerned. In any case, we thank you for your time spent in the interviewing process and wish you good luck with your continued job search.
Yours truly,