Originally Posted by mstngchic2012
Is it legal to for the person that is holding the papers demand to be paid in order to get them?
If the horse was sold without papers, then yes, the previous owner can request a fee in order for the current owner to get them.
If the horse was sold to your FIL with the express stipulation that the reason he was getting the horse for such a low price was because he came without his papers, then getting them will cost you.
If you have no idea of the horse's registered name or his pedigree, you're out of luck trying to contact the breed registry.
What do you need his papers for, anyway? As a cryptorchid, he's likely infertile. Unless you're planning to show in breed shows with him, his registration papers aren't all that important.