I had that happen (as Becky stated).
I bought a mare, had her DNA'd PQ'd & NEITHER parent was right. The breeder swar up & down it was correct. AMHA did the test 3 TIMES and all 3 came back the same (just in case it was a glitch on there end & the breeder stating she was out of so & so)! Wrong parents. Then they checked against others & there were 6 possablities only the breeder stated he never owned any of the 6 possabilities. (This was my 2nd mare this happened to from this breeder- the 1st we found her true parents- I bought both mares at the same time).
Thus, even after me putting up a "stink" about this, the lady in the lab took it to the president of AMHA & HE DECIDED THAT IT DOESN'T MATTER THAT SHE'S GOT THE WRONG PARENTS & THEY LEFT HER PAPERS AS THEY ARE & THE BREEDER DIDN'T GET SUSSPENDED OR ANYTHING- NOT EVEN A SLAP ON THE WRISTS!
Needless to say, I was & still am not too happy about that as I paid for an AMHA Registered mare & basically got a "grade" mare even though AMHA left her keep her papers. I even asked AMHA why they decided this & got nowhere- they said to leave it alone & continue breeding her like I planned (since I bred her before her DNA test came back). I can't live a lie like they all (at AMHA) stated me to do if I plan to breed her for registered foals. Thats just a bunch of bull. And from that day forth, I swar I'd never go back to that breeder again & if anyone asks me about him, he wouldn't get a good recommendation. My family bought quite a few minis from him & don't know how he could claim they were what they were when clearly they didn't come from who he said they did, etc. Especially since he runs multiple stallions & then moves the mares to a different one without waiting the 42 days between stallion, etc... Go figure- Lesson learnt for all of us- No wonder why the man ONLY DNA's & DOESN'T PQ (the ones he can PQ).
I just wish in these cases where there are multiple horses in question, that AMHA would do something- The breeders are clearly not running by the rules (course I don't know if AMHA has a rule between stallion, I know AMHR has the 42 day rule). I can perhaps understand 1 accident, but not multiple ones like with this breeder & the minis my family bought. We sold those that didn't match up without there papers & just cut our losses. They got great homes that just wanted pets in the end anyhow. But AMHA should have done something, especially since I specifically asked for them to do something such as penalizing or suspending him. This just shows that anyone can do this & AMHA will let it slide... But I still love AMHA. But it won't be me being like this breeder.