Two Proofs of California Residency. To prove that you live in California, you must present two documents that contain your California physical address.Write a letter to a state agency, like the DMV, or voter registration, that will require an answer from them. Applying for a REAL ID requires proof of identity, proof of California residency, and a trip to DMV. Don't have utility bills? Proof of address may be in paper or electronic format. It must include the voter's name and current address. I am a resident of or employed in the county where the mailing took place. My residence or business address is: On (date):.