Locating the owners of abandoned houses

[Charisse C.]

I've been wholesaling for about a year now and I seem to run across the same consistent problem. How do you find the owner of and abandoned house?

I've heard put your sign in their yard
Leave notes on the door

Isn't there an easier or more specific way to find the owner? When I look at the tax records, I don't see any information that will help me find them.