I have a few printed stamps from the APC for $2.13 because I tend to buy a couple of extra when I go into the post office so I can just drop the books in the blue box the next time. So, I just said I could mail a couple of books in 2 days because I thought they would be under a pound, but they aren't - PBS says $3.15 and $2.47 each. So, if I just add extra stamps to make it that amount, can I still drop it in the blue box since I also have the APC on there or is that not OK? I don't have the time to go to the post office in the next two days since I went in *yesterday* to mail 2 other books... If not, is it possible to change it to "can mail later" at this point?

Yes, you should be able to just add the extra postage using stamps.  The APC portion of the postage satisfies the trackability requirement.

Thanks! Whew! I don't mind going to the blue box,but lately theres even a line at the APC here. Crazy!

I would weigh the books if you can though, before adding the extra postage. Sometimes PBS calculations are not accurate.

Cheryl

If you add stamps to them, you may not be able to drop them in a blue box if they're over 13 ounces.  I don't know if the "original" one counts as not being stamped to get around that rule, but I wouldn't chance it - I'd take them to the PO.

The rules is that packages with ONLY stamps have to meet the 13-oz rule.  If there is an APC sticker, it is traceable to you, and is ok to put in the box.  So it is fine to add stamps.  I've done it several times.