1. Notice may be given by publication if the office does not:

1. (a) know the identity of the lender; or
2. (b) know the address of the lender; or
3. (c) receive proof that the notice mailed under section 19.14 of this article was received within thirty days of mailing.

2. Notice by publication must be given at least once a week for three consecutive weeks in a newspaper of general circulation in:

1. (a) the county in which the property is held by the office; and
2. (b) the county of the lender's last address, if known. The date of notice under this subdivision shall be the date of the third published notice.