What post office did you go to and did it cost you money for hand canceling?Back story...I went to post office and brought my finished invite in to see how much postage would be. Brought stamps and mailed. Received a lovely note from the post office that they were holding my invites hostage since I needed an additional .20 (thanks Hyde park waste of space employee!) Apparenlty they are not machinable and the .20 is for the hand canceling...I checked the USPS website which states the same. Is this always the case, or can I just go to the post office (as opposed to just putting them in the mailbox) and asking them to hand cancel?