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.