A Buyer/Borrower may be able to force a Seller/Lender or assignees to defend title regardless of the use of QCD.  

(after your mod)  Thus they do not apply.It is not clear what threat you are trying to defend against specifically.  

The defendant made an intentional action, statement, or omission (Falsely claiming to be a cash buyer, misrepresenting your intention and ability to close the transaction)b.

@Gerald O'BrienAs an attorney that did a lot of quiet-title actions, there are 100 of reasons why the plaintiffs named your aunt as a defendant.

In an eviction suit the defendant has to be served(or at least attempted) 

So if you spent all that money on skip tracers, be ready to spend more on lawyers defending yourself when you're accused of cheating little old ladies.If you found a way to find the owners, she has three children, lets say you found us, you would be just another solicitor that we have to get rid of.

[defendant] at [subject property address] information.I think I found the property tax listings, it's a giant text searchable PDF.

Lastly, I don't care how many votes someone has, when they're wrong, I will defend my position.

I note, that you attempted to defend the idea in your last post but you can't seem to post a fund or firm name or reference the article.

If I were a seller I would think returning the buyers costs would certainly be cheaper than defending a specific performance suit.