Can you do registered mail in a flat rste box

In the United States, the United States Postal Service (USPS) allows you to use a flat rate envelope or box for registered mail, but there are some limitations and considerations to keep in mind.

Here are the general guidelines:

  1. Flat Rate Envelope: You can use a flat rate envelope (such as a Priority Mail Flat Rate Envelope) for registered mail, but it must be specifically designated as a "Registered Mail" envelope. You can do this by writing "Registered Mail" on the envelope and affixing the correct postage.
  2. Flat Rate Box: You can also use a flat rate box (such as a Priority Mail Flat Rate Box) for registered mail, but it must be a specifically designed registered mail box. These boxes are usually marked with a "Registered Mail" label and have a special tracking label.
  3. Size and Weight Limitations: Regardless of whether you use a flat rate envelope or box, the item must fit within the USPS's size and weight limitations for registered mail. For example, the maximum weight for a flat rate envelope is 13 ounces, while the maximum weight for a flat rate box is 70 pounds.
  4. Additional Fees: Keep in mind that using a flat rate envelope or box for registered mail may incur additional fees. For example, you may need to pay an extra fee for the registered mail service, as well as any additional fees for insurance or tracking.

To summarize:

It's always a good idea to check with your local post office or the USPS website for the most up-to-date information on registered mail services and fees.