# MSG-155 — Sweepstakes content requires the sweepstakes use case

> Where samples contain sweepstakes or contest content, the sweepstakes use case must be declared.

- **Rule ID:** MSG-155
- **Layer:** Message content (`MESSAGE_CONTENT`)
- **Checks:** `campaign.sample[] + campaign.usecase`
- **Severity:** BLOCKING — Breaking this rule gets the submission rejected outright.
- **When it bites:** Gates approval — get this wrong and registration is refused
- **How it is detected:** AI judgement over the submitted form
- **Fix type:** Fix the field — a better value in the form clears it
- **Required by:** TCR, Sinch, Bandwidth
- **Applies:** Applies to every 10DLC registration.
- **Canonical URL:** https://ekas.io/rules/10dlc/message-content/msg-155/

## Why this rule exists

Sweepstakes carry their own eligibility and official-rules requirements, and several providers subject them to special business review. Running one under a general marketing use case bypasses that review, so reviewers force the correction rather than accepting the label.

## How to fix it

Declare the sweepstakes use case and publish official rules linked from the message, or remove contest content from the campaign.

## Example of a compliant value

```text
Use case: SWEEPSTAKE, with official rules at acmecoffee.com/rules linked in the message.
```