It is still a win/win for you but you avoid the appearance of wrong doing.  

Stating it is wrong does not add meaningful to the conversation, and after reading through your supplied link I did not see anything that was countermanded.

Beth and Chris then changed the contract at the very last moment and the deal fell apart, we offered to go back and complete the original contract and none of the extra that was added, which we were denied.Judge for   yourself where the  wrong doing is 

Laws were changed in response to the wrongdoing in the early 2000's, and there is more transparency than there has ever been.Caution is always advisable, but I think the bigger challenge for condos is finding buyers in the future.

I agree with Jacques many things can go wrong.  Do

If the application falls thru because of untimely or the lack of cooperation from the tenant, or any other wrong doing, I forfeit the holding deposit.

and as mentioned you do have responsibility for due diligence just because a seller might be guilty of wrongdoing your damages might not exceed your legal fees

Here's another article about PIP's alleged wrongdoing from Veritas News:Are Tax Lien Investments the Latest Real Estate Ripoff?

if you have solid facts of wrongdoing, I think any licensing organization is a first call for breach of any professional duties, and if it is outright fraud, a consumer site likely from  the attorney general or law enforcement would be possible, and a civil case could be pursued privately for damages....there are even more places for business complaints and reviews. 

Can I pass the fine on to the tenant if I can document that it resulted from their wrong-doing?