Encourage you to read the comments by Richard Winblad regarding the trouble with turning over a lease without getting paid. Search his name with the magnifying glass above.
I never turn over a lease without getting paid unless I know the landman and have had perfect results in the past. The way to get around it is to have a third party such as an accountant, attorney or bank hold the signed lease and not turning it over until the check arrives. I also have a cover letter that says if the check does not arrive within the mandated time frame, the lease will be returned to me and destroyed and negotiations will begin again. There are too many instances of leases being filed with no payment being tendered. Causes legal issues.