M_Barnes,
Thank you. That is essentially what I ended up doing, but without the concise language you suggest. Since certified return receipt letters are now nearly $10 a pop, I am wondering if there is a public record way to find the information.
Richard,
I know the state, county, legal description and the producer but am looking for the specific current lease that controls the royalty. I have accessed various counties on-line records for different interests and generally find that I can search on names but end up with a large number of documents to review (purchase). Is there some mechanism for searching on the producer name and some other factor such as lease number, well name etc that I may not be aware of? Particularly interested in Midland, Martin, Fisher and Glasscock counties.