Sender registration
Sender registration records who may send, from which identity and for what content, before traffic flows.
Definitions only — a term explained here is not a service we sell.
Sender registration is the process of filing the legal entity, the sender identity, the use case and sometimes the message content with an authority or operator. Markets that require it throttle or block unregistered traffic.
The checks cover the legal entity, the sender identity and the use case, and sometimes the message content. A submission passes pre-check, review and approval before go-live. A change can trigger a new review. Rejections usually come from a mismatch between the registered entity and the sender, missing consent evidence or content outside the approved category.
Evidence and approval
An evidence package typically includes company documents, a letter of authorization and proof of consent. The approval reference belongs with the campaign record. Produce it first when a message is challenged.
Registration paths by sender type
| Registration paths by sender type | Alpha sender | Short code | Long number |
|---|---|---|---|
| Reply path | Usually no | Yes | Yes |
| Registration | Per market | National allocation | Per market |
| Best for | One-way alerts | High-volume two-way | Two-way with a local number |
Text description
An alphanumeric ID usually cannot receive replies and is registered per market. A long number can receive replies and is registered per market. A short code takes a national allocation and serves high-volume two-way traffic.
Plan it as a dependency
Registration has an owner and a renewal date, and it is not a one-off document. Confirm who submits, what each market requires and what happens to traffic during review. The sender ID in Mexico and Brazil note covers two local regimes.