Can You Put a Return Address on the Envelope Flap?

Yes, you can put a return address on the envelope flap. While the conventional position is typically in the upper left corner on the front of the envelope, placing it on the flap is an alternative option. Just ensure that the return address is clear and legible, so it can be easily read in case the envelope needs to be returned.

Challenges with Placing Return Address on the Envelope Flap

In some instances, placing the return address on the envelope flap has caused confusion for the AFCS200, the first sorting machine used by the postal service. AFCS200 can sometimes misinterpret the front or rear address as the actual destination, leading to delays but ultimately the letters were delivered, albeit with slight delays.

Is Placing the Return Address on the Back of the Envelope Acceptable?

Yes, it is acceptable to write the return address on the back of the envelope. However, it is not the best practice. Post offices typically look for a return address in the upper left corner of the main address on the front of the envelope. If the back is used, the envelope will still be flipped over, which can lead to confusion during automatic sorting. The stamps are typically located on the front, and if the envelope needs to be reversed at each stage of processing, it can create complications.

USPS Recommendations

The United States Postal Service (USPS) generally recommends placing the return address on the front of the envelope in the upper left corner. This placement ensures that the address is easily visible and readable in case the envelope needs to be returned to the sender. Other countries might have different preferences, so it is always a good idea to check with the specific postal service guidelines before sending international mail.

Conclusion

While you can place a return address on the envelope flap, it is recommended to place it in the upper left corner of the front of the envelope for easy readability. This ensures that the postal sorting process is efficient and the envelope can be easily returned if necessary. Remember, the clearer and more legible the return address, the better the chances of successful delivery and timely return.