Search online records such as Texasfile for an assignment out of your lessee (your lessee as Grantor) to another company. Often you will have to review an attached exhibit for the list of leases assigned. Sometimes an assignment will be only partial depths or only a fractional interest in the lease, in which case you will have 2 lessees owning part of the lease. Once you find a assignee (eg B), then you can search to see if B has subsequently assigned the lease. If it is a n old lease, there can be many assignments over the years.
1 Like