New York Consolidated Laws, Public Officers Law - PBO § 68. Allowance of additional fees and expenses

Where an officer or other person is required, in the course of a duty imposed upon him by law, to take an oath, to acknowledge an instrument, to cause an instrument to be filed or recorded, or to transmit a paper to another officer, he is entitled, in addition to the fees, or other compensation for the service, prescribed by law, to the fees necessarily paid by him, to the officer who administered the oath, or took the acknowledgment, or filed or recorded the instrument; and to the expense of transmitting the paper, including postage, where the transmission is lawfully made through the post-office.