If you know the registered names and/or registration numbers of your horse's sire and dam, I WOULD call AQHA, ask for registration, tell them you are getting ready to send in a membership to AQHA and an application to register a horse, but you need some information first.....and ask the following--
*Name and address of owner of sire the month/year your horse was conceived
*Name and address of owner of the dam the month/year your horse was foaled
*if there is DNA on file for sire
*If there is DNA on file for dam
*If a stallion breeding report was filed for the sire the year your horse was conceived, and if the dam's name appears on it
If you know the answers to the above questions, it could save you time and money.
If the stallion owner did not file a stallion breeding report (SBR) for the year your horses's sire bred its dam, that would need to be filed. The stallion owner needs to sign it and provide breeding dates.
Here is info on that-- AQHA: Submit Stallion Breeding Reports
Here is where to get the form-- http://www.aqha.com/en/About/Content...ingReport.ashx
For registering a Quarter Horse over 2 years old, you have to send in DNA on your horse for parentage verification-- meaning your horse, its dam and sire all have to have DNA on file. If DNA of the sire and dam are not already on file, it needs to be sent in. here is the form for ordering a DNA kit-- http://www.aqha.com/~/media/5707033BAC3C476C8840A04E2CD62CD3.ashx
The stallion owner and mare owner would both need to sign the registration application for you (and the breeding dates on that application in the breeders certificate section would need to match the breeding dates on the SBR.) Here is a registration application-- http://www.aqha.com/~/media/BEC032C3...EDF2CA99A.ashx
The owner of the dam at the time of foaling would also need to sign a transfer of ownership to you. Here is that form-- http://www.aqha.com/~/media/C2FD6449...71A0E61E6.ashx
Here is more basic registration info from AQHA--- AQHA: Register a Horse
The best case scenario is if there is already an SBR filed, and both sire and dam have DNA on file. If so, your costs would be a membership ($25), the registration application ($300 special), DNA fee for your horse ($50), and transfer fee ($15).
Otherwise, you may end up having to pay for a late SBR to be filed ($25 to file plus $5 for each mare listed, and a $30 late fee).... and you might also have to pay the stallion owner's membership ($25), they are not a current member. You might have to pay for one or both parents to have DNA filed ($50 each).
I say "might" because if the registerability of your horse was not written into your bill of sale, and if the mare/stallion owner don't want to pay the above fees, you would have to pay them if you want it done.
Alaso this is all assuming that the mare and stallion owner are willing to sign all of the necessary forms. If not, you will not be able to register your horse.