I have tried it successfully before, but just to be safe, I want to confirm there is no issue in placing a small flat rate box addressed to a country in Western Europe with $5.95 in postage on it? On the side of the box it reads "when used internationally, affix customs declaration". I have however successfully sent the same type of box internationally with no customs declaration. The thing that has m confused it that the international flat rate boxes are ~$40+.
Thank you
No, $5.95 in postage will not cut the mustard.