A proof of residency letter also known as an Affidavit of residence is a written declaration that a particular individual actually resides. Proof of payment of resident tuition at a public institution of higher education located in California.Permanent Resident Alien, you must provide the following documentation to obtain a Limited-. Address three envelopes to yourself and mail them. When they arrive they serve as proof of residence in some states. First, find out why your tenant needs a proof of residency letter. Schools like Salt Lake Community College allow you to submit your proof of residency for three weeks after the start of your school year. Residency Verification. If you need verification of your residency status sent to another school, please fill out the request for Residency Verification Form.