Why You Might Need a Non-Machinable Stamp (And What It Actually Means)
Have you ever dropped a letter in the mailbox, only to have it returned days later with a mysterious message about “non-machinable postage required”? If so, you’re not alone. The U.S. Postal Service (USPS) has a lot of rules—especially about what types of mail can go through its sorting machines. That’s where the non-machinable stamp … Read more