I am trying to help my mother locate unknown mineral rights thru out all Texas cntys and maybe other states. She was left all Real properties from a friend in his will and a list of them. In the Will it just says all Real Properties,but he had given her a list of the ones he could remember and she transfered those pretty easy. I am asking this question because she has had some landmen track her down for some she did not have on the list. She needs to either find the rest of uknown ones in Texas or other states possibly, are make it easier for landmen to find her. What happens to a mineral right if an operator cannot locate a living mineral right owner,where does the proceeds go and who pays the taxes on it?