Here we go I am in process of selling my car and believe I require a certificate of residence from immigration.

What paperwork do I require to take in for this? I am here on retirement extension and already have a paper in my passport notifying them of the "Aliens" residence. 

Same as required to inform the immigration office of your alien residence...rental agreement or blue book of owner or yellow book etc etc

Don't think you need the CoR. Just a valid stay date stamp in your passport. Copies of those pages in your passport and the blue book. Doubt you need a copy of home rental contact. Mind you it's been quite a few years since I sold/transfer a vehicle

Last June, having already in my passport the address notification, I just needed a picture, passport copies and, of course, to fill the relevant form.

 

Very fast process, probably they will ask you 300 baht, ( hope to not start now the usual discussion about tips at the immigrationa.....)