thecoolguysam said:
its my wife's parent's house. does it require any additional proof then i was living with my wife and her parents....
aed is right to suggest getting a notarized statement from the people you were living with if you get an RQ. The RQ requests a number of different documents in different areas of your life: employment, residence, financial, community involvement, travel, etc. The documents related to residence are really important to a residence questionnaire response. If you don't have rental or mortgage documents relating to a period covered, you would be well advised to 1. provide a notarized letter from the roommate or relative you were staying with as well as a copy of their lease or mortgage document and 2. provide supplementary evidence for that period from the other categories as well.
In general, an affidavit or a notarized letter is better than a non-notarized letter; a non-notarized letter is better than no letter.
As to whether a notarized letter "is acceptable proof": The CIC will take whatever you send into account. But RQs do not hinge on a one document, so it's not a question of finding the one secret ingredient that will solve all the problems immediately. RQs hinge on the quantity and quality of all the documents you submit, the content of the documents, the CIC's own files and your overall integrity.