Who pays for the postage if an envelope says "no postage necessary if mailed in the U.S?"

Answer by  golden (348)

The postage is pre-paid for by the company who sent the envelope. The company has already communicated with the post office and purchased pre-paid envelopes.

Answer by  fesdre (655)

If the envelope says that, then that means that the company who the letter is going to pays that postage. This is because they pre-work out a deal with the post office. The reason they do it this way instead of leaving a stamp on the letter is because any that aren't sent, probably are not charged for.