Definition of MAILING OR MAIL:
(verb/noun) / a direction to mail or for mailing of process, notice or other paper requires deposit of such process, notice or other paper enclosed in a sealed postpaid envelope, directed to the person to be served or notified, in any post office or other depositary under the exclusive care and custody of the United States Postal Service
Plain English Translation: When the Surrogate says, “mail it,” send it via United States Post Office. Put it in a sealed, addressed envelope with postage paid, and drop it in a mailbox.