APHA is actually doing an incentive right now, my solid paint mare is 13 and at this point in time it only cost around 265 for the registration fee, extra fees, and 2 DNA kits, to get her registered at this late age, because of the incentive. It usually would of cost 500 plus. Anyway I know they don't do this anymore, but in the early 1900's there were some non eligible grade horses accepted into the registry. You could have your horse evaluated to see if your horse was eligible. Of course these horses were of exceptional conformation, and disposition. I know this because way back on one of my horses papers a horse has "unreg." under its name, but its
offspring was registered APHA. I called the association, and that's what they told me!