Mail do not bend

A classic phrase!

"Mail Do Not Bend" is a phrase that was often printed on envelopes, particularly in the United States, from the mid-20th century to the early 2000s. The phrase was a request to postal workers not to bend or crease the envelope, as this could cause damage to the contents or make it difficult to open.

The phrase was usually printed in bold letters, often in red or black ink, and was intended to alert postal workers to handle the envelope with care. It was particularly common on envelopes containing sensitive or valuable items, such as checks, bills, or important documents.

With the advent of modern mail handling practices and the decline of handwritten addresses, the phrase "Mail Do Not Bend" has largely fallen out of use. Today, it's mostly a nostalgic reminder of a bygone era in postal history.