Complete this affidavit and bring to an RMV Service Center with Certificate of Title and other required documents. A. Vehicle Information.This form must be signed in the presence of a Notary Public. Note: You may be asked to provide a photo identification with your current legal name. How do I fill this out? Tip 1: Double-check the certificate while the signer is present. Catching a mistake before your signer leaves is the best-case scenario. 1. Complete the affidavit legibly in blue or black ink or typed. Massachusetts Affidavit Templates. Use our Affidavit template to swear to the truthfulness of a statement or fact.