Section 427 - Service of summons(a) Personal service of a summons and petition may be made by delivery of a true copy thereof to the person summoned at least eight days before the time stated therein for appearance; or by delivery of a true copy thereof to a person of suitable age and discretion at the actual place of business, dwelling place or usual place of abode of the person to be served and by mailing a true copy thereof to the person to be served at his last known residence at least eight days before the time stated in the summons for appearance; proof of service shall identify such person of suitable age and discretion and state the date, time and place of service.(b) If after reasonable effort, personal service is not made, the court may at any stage in the proceedings make an order providing for substituted service in the manner provided for substituted service in the civil practice law and rules.(c) In any case, whether or not service is attempted under subdivision (a) or (b) of this section, service of a summons and petition under this section may be effected by mail alone to the last known address of the person to be served. Service by mail alone shall be made at least eight days before the time stated in the summons for appearance. If service is by mail alone, the court will enter an order of support by default if there is proof satisfactory to the court that the respondent had actual notice of the commencement of the proceeding which may be established upon sufficient proof that the summons and petition were in fact mailed by certified mail and signed for at the respondent's correct street address or signed for at the post office. If service by certified mail at the respondent's correct street address cannot be accomplished, service pursuant to subdivisions one, two, three or four of section three hundred eight of the civil practice law and rules shall be deemed good and sufficient service. Upon failure of the respondent to obey a summons served in accordance with the provisions of this section by means other than mail alone, the court will enter an order of support by default. Such order of support shall be made pursuant to the provisions set forth in section four hundred thirteen of this article. The respondent shall have the right to make a motion for relief from such default order within one year from the date such order was entered.N.Y. Family Court Law § 427