I hate that kind of stuff. Not the delay itself, but the worry that I myself will forget or I don't have a good enough evidence trail to link back to the fact that I was owed something in return... or that it's so far removed that they simply go, "What?"
In all fairness, it normally seems to work out though. I'm not just talking about PSN. I remember in Best Buy's Magnolia center, there are times where you could get 4x bonus points, but they took like three months to go through and there was no real record of showing it anywhere prior to. It would always eventually happen, but I just didn't understand/trust that the system would do what it was supposed to.

Comment