I'm just now testing actual orders (test ones by me, not live yet) and I see there is an option to do a full or partial refund, and there is also something called "Voiding Order Authorizations"... what is the difference?

And I read in another (closed) thread that the "enter auth ID" is actually the "TransID" from the original order (from PayPal)... is that true?

Which should I use or are they for different situations? If so, what situation uses what method?

Thanks, a little bit confused here...