A return merchandise authorization (RMA), return authorization (RA) or return goods authorization (RGA) is a part of the process of returning a product to receive a refund, replacement, or repair during the product's warranty period. Both parties can decide how to deal with it, which could be refund, replacement or repair.

n. a person authorized by the state in which the person resides to administer oaths (swearings to truth of a statement), take acknowledgments, certify documents and to take depositions if the notary is also a court reporter. The signature and seal or stamp of a notary public is necessary to attest to the oath of truth of a person making an affidavit and to attest that a person has acknowledged that he/she executed a deed, power of attorney or other document, and is required for recording in public records. The Secretary of State of each state appoints notaries public for a specified term of years. A notary public must see proof of identity (e.g. driver's license) of those swearing and keep an official journal of documents notarized. The authority is good only in the state which appoints the notary.