1. An affidavit by a party seeking service stating one or more of the following grounds:

a. That the party to be served is (i) a foreign corporation, (ii) a foreign unincorporated association, order, or a foreign unincorporated common carrier, or (iii) a nonresident individual, other than a nonresident individual fiduciary who has appointed a statutory agent under § 64.2-1426; or

b. That diligence has been used without effect to ascertain the location of the party to be served; or

c. That the last known residence of the party to be served was in the county or city in which service is sought and that a return has been filed by the sheriff that the process has been in his hands for twenty-one days and that he has been unable to make service; or

2. In any action, when a pleading (i) states that there are or may be persons, whose names are unknown, interested in the subject to be divided or disposed of; (ii) briefly describes the nature of such interest; and (iii) makes such persons defendants by the general description of “parties unknown”; or

3. In any action, when (i) the number of defendants upon whom process has been served exceeds ten and (ii) it appears by a pleading, or exhibit filed, that such defendants represent like interests with the parties not served with process.Under subdivisions 1 and 2 of this subsection, the order of publication may be entered by the clerk of the court. Under this subdivision such order may be entered only by the court. However, any orders not properly entered, but processed by a clerk prior to July 1, 2010, shall be deemed to have been properly entered.Every affidavit for an order of publication shall state the last known post office address of the party against whom publication is asked, or if such address is unknown, the affidavit shall state that fact.