What is a sender name and why is it sometimes refused?

Instead of a phone number, a name can appear above your message. That improves recognition, but rules apply.

The basic rules

An alphanumeric sender is at most eleven characters, without spaces or punctuation. Use something the recipient recognises immediately: your trading name, not an abbreviation that is only known internally.

The drawback

A name cannot be replied to. If you want to receive replies, you need a real number — a virtual number or a shortcode.

Why it sometimes does not work

Not every country allows alphanumeric senders. Some require prior registration, others simply replace your name with a number. If you send internationally, check this per destination — otherwise your message arrives from an unknown number and trust drops.

What you never do

Use another organisation's name. That is not only misleading, it is exactly the pattern operators filter on, and it puts your own traffic at risk.