Alabama ejectment letter returned. What next?

[Roger Gelpey]

We got, one of our letters of ejectment back as "undeliverable unable to forward" today. We have no other address for the taxpayer but do for relatives. Would sending a letter to the relative asking to forward be reasonable? The parcel is an empty lot so should I just sit tight until I get the deed? I realize a quiet title will probably require a skip-trace but should I spend that money at this stage? Thanks to all as usual.