HUD Handbook 4350.3 § 4-20

The owner must document removal of any names from the waiting list with the time and
        date of the removal.

        A.       The tenant selection plan must include a written policy that describes when
                 applicant names will be removed from the waiting list. Examples of applicant
                 removal policies an owner may adopt are:

                 1.       The applicant no longer meets the eligibility requirements for the property
                          or program;
                 2.       The applicant fails to respond to a written notice for an eligibility interview;
                 3.       The applicant is offered and rejects two units in the property (or any
                          number of unit offers as specified in the owner's written policies);
                 4.       *The applicant fails to provide SSNs for all household members.*

                 5.       Mail sent to the applicant's address is returned as undeliverable; or
                 6.       The unit that is needed – using family size as the basis – changes, and no
                          appropriate size unit exists in the property.
        B.       The owner must periodically print out electronic waiting lists or preserve backup
                 copies showing how the waiting list appeared before and after the removal of
                 each name.