If you agree to the all the above, you will sign the acceptance copy that the bank will then keep for its records. (housing.com)
Also document as much as possible and keep for your records in case the town or building department come knocking. (biggerpockets.com)
For added IRS protection, you'll want to keep for your record documents that can prove the person was a contract worker and not an employee. (rocketlawyer.com)