Engineer Seal Stamps Any postal office needs a variety of postal stamps to handle different kinds of mail. These stamps are also handy for businesses that deal with a lot of mail on a regular basis. This Self-Inking Stamp says Return Receipt Requested, which tells the... moreAny postal office needs a variety of postal stamps to handle different kinds of mail. These stamps are also handy for businesses that deal with a lot of mail on a regular basis. This Self-Inking Stamp says Return Receipt Requested, which tells the recipient and the delivery person what the sender wants. The sender will get proof that the package reached the right address. Get here: https://bit.ly/3fWo5ZK