I've never had a problem with AP tracking, but I believe that others have.  

Though, just thinking about it, AP tracking only shows as 'Delivered', but doesn't show delivered to an ACTUAL ADDRESS.   So probably not worth even printing it off for 'evidence'.  And PO receipt only shows Postcode, evidence only of posting, not receipt at the other end.

Which indicates that sellers are going to be between the proverbial 'rock and a hard place' no matter what they do.  

The only way I can see is that everyone will have to send items with SOD - a heck of an expensive way to cover rear ends when item and post may be worth, say, less than $15/$20.

Hopefully some of the brains on here may be able work out a way around the problem.