Can i add a stamp to metered mail

In the United States, the answer is generally no, you cannot add a stamp to metered mail. Here's why:

Metered mail is mail that is processed through a postage meter machine, which prints the postage directly onto the envelope or package. The postage meter machine is designed to apply a specific amount of postage to the mailpiece, and adding a separate stamp would invalidate the metered postage.

The United States Postal Service (USPS) has specific regulations regarding the use of postage meters, and adding a separate stamp to metered mail is not allowed. According to USPS Publication 52, "Hazardous, Restricted, and Perishable Mail," "Metered mail may not be franked with additional postage or stamps."

If you need to add additional postage to a metered mailpiece, you should contact the USPS or the company that provided the postage meter machine for assistance. They may be able to provide guidance on how to add the additional postage or provide a refund for the excess postage.

It's worth noting that some postage meter machines may have specific features that allow you to add additional postage or adjust the postage amount, but these features are typically only available on certain types of machines and may require special authorization from the USPS.