N.Y. Civil Practice Law & Rules § 4533-a: Prima facie proof of damages

Rule 4533-a. Prima facie proof of damages. An itemized bill or

invoice, receipted or marked paid, for services or repairs of an amount

not in excess of two thousand dollars is admissible in evidence and is

prima facie evidence of the reasonable value and necessity of such

services or repairs itemized therein in any civil action provided it

bears a certification by the person, firm or corporation, or an

authorized agent or employee thereof, rendering such services or making

such repairs and charging for the same, and contains a verified

statement that no part of the payment received therefor will be refunded

to the debtor, and that the amounts itemized therein are the usual and

customary rates charged for such services or repairs by the affiant or

his employer; and provided further that a true copy of such itemized

bill or invoice together with a notice of intention to introduce such

bill or invoice into evidence pursuant to this rule is served upon each

party at least ten days before the trial. No more than one bill or

invoice from the same person, firm or corporation to the same debtor

shall be admissible in evidence under this rule in the same action.