The hosted evidence URL must return the artifact, not an error page

The requirementstatement

A hosted evidence URL must return 200 and render the artifact rather than a 404, a timeout, a redirect or a placeholder.

Severityseverity: BlockingBLOCKINGBreaking this rule gets the submission rejected. There is no partial credit.
When it bitesphase: Gates approvalapprovalGet this wrong and the brand or campaign is refused at registration.
What is checkedobject: hosted evidence URL
Where it liveslayer: CampaignCAMPAIGN
How Ekas settles itdetectability: AI · crawlCRAWL; Needs your live site or policy page fetched and read. Ekas crawls it the way a reviewer would.
What the fix involvesfailureClass: Supply evidenceTERMINAL_EVIDENCE; Needs proof only you hold: a screenshot, a recording, a scan of the form people signed.
Who requires itauthorities: TwilioAerialink
When it appliesapplicabilityText: Applies to every 10DLC registration.

Why this rule existsrationale

Evidence links rot between writing the registration and the review, and the failure is silent from the submitter's side because their browser serves the file from cache. A reviewer who follows the link and sees a 404 does not chase it — the campaign is rejected for missing evidence that the submitter can still see on their own screen.

How to fix itremediation

Open every evidence URL in a private browsing window on a device that has never seen it, and replace any that do not render the file itself. Done when each link returns the image or PDF directly rather than a viewer page, a login, or a "file not found".

Common mistakespitfalls

A cloud-drive preview page returns 200 while showing the reviewer a sign-in prompt, so status code alone is not the test — what came back has to be the artifact.

Provider rejection codescodes

The code you get back when this rule is what failed, and whether that provider lets you resubmit.

Provider	Code	Resubmit
Twilio	30891	Yes
Twilio	30922	Yes

Rules you will hit next

2 other rules read hosted evidence URL. Fixing one field to satisfy a single rule is how a resubmission trades one rejection for another, so read these before you change anything.

CMP-068Evidence links must keep working after approvalHighHIGH CMP-115A point-of-sale opt-in must show the sign the customer readHighHIGH CMP-003Message flow must not begin or end with whitespaceBlockingBLOCKING CMP-017Every mandatory campaign attribute must be explicitly setBlockingBLOCKING CMP-024Registration fields must be written in EnglishBlockingBLOCKING CMP-028Opt-in evidence must be a JPG, PNG or PDF under 500 KBBlockingBLOCKING

All campaign rules

CMP-067 is one of 94 campaign rules in the 915-rule 10DLC registry. Free to cite under CC BY 4.0.