New York Civil Practice Law & Rules R4520 - Certificate or affidavit of public officer.

Rule  4520. Certificate or affidavit of public officer. Where a public
  officer is required or authorized, by special provision of law, to  make
  a  certificate  or  an  affidavit  to  a  fact  ascertained,  or  an act
  performed, by him in the course of his official duty,  and  to  file  or
  deposit it in a public office of the state, the certificate or affidavit
  so filed or deposited is prima facie evidence of the facts stated.

Last modified: February 3, 2019