How to fill out priority mail express flat rate envelope

To fill out a Priority Mail Express Flat Rate envelope, follow these steps:

Step 1: Address the Envelope

Step 2: Fill Out the Shipping Label

Step 3: Add the Flat Rate Fee

Step 4: Add Any Additional Services

Step 5: Seal the Envelope

Step 6: Affix the Postage

Step 7: Hand it Over

That's it! Your Priority Mail Express flat rate envelope is now ready to be sent to its destination.