A receipt is a written acknowledgment or proof of a financial transaction that provides evidence of the exchange of goods, services, or money between parties. A Michigan notary acknowledgment form is a document that a notary public uses to verify an individual's signature on a legal instrument.Submit this form to the court clerk along with your complaint and, if necessary, a case inventory addendum (MC 21). Completing the Proof of Service. (2) If a rule uses the term "certified mail," a postmarked receipt of mailing is not required. Registered mail may be used when a rule requires certified mail. Complete the front of the form and the "Affidavit for Judgment Debtor Examination" section on the bottom of the form. (2) If a rule uses the term "certified mail," a postmarked receipt of mailing is not required. Registered mail may be used when a rule requires certified mail. Specify how the letter is delivered (e.g.