So you have tax lien certificates. The question is, what do you do with it? There are several options that you could go about. The first one is to assume the property, which would then make it yours. Another option would be to have the previous owner pay you back, with interest. This can work great for houses, as people will do anything to make sure that their families have a roof over their heads. On the other hand, most people will let undeveloped land go, and you’d better have a new option, or you’ll be stuck paying the property taxes on that plot.