Opt-in evidence must be a JPG, PNG or PDF under 500 KB
The requirementstatement
Uploaded opt-in evidence must be a JPG, PNG or PDF file no larger than 500 KB.
- 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
- campaign opt-in evidence upload
- Where it liveslayer
- CampaignCAMPAIGN
- How Ekas settles itdetectability
- DeterministicDETERMINISTIC
- Settled in code from the values you submitted. No model involved, no judgement call, same answer every time.
- 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
- AWSTextUs
- When it appliesapplicabilityText
- Applies to every 10DLC registration.
Why this rule existsrationale
The upload field rejects anything else outright, and the two formats people actually reach for are the two that fail: a phone screenshot saved as HEIC, and a full-resolution PNG straight off a retina display that is several megabytes. Both look like ordinary screenshots to the person attaching them, so the rejection reads as arbitrary.
How to fix itremediation
Export the screenshot as PNG or JPG — on iOS, change Settings › Camera › Formats to "Most Compatible", or open the file and re-save it — and shrink it below 500 KB by cropping to the consent surface rather than the whole page. Done when the file opens in a browser and its size reads under 500 KB.
Common mistakespitfalls
- Cropping to reduce the size is the right move only until it cuts off the disclosure text; a small screenshot that no longer shows what the consumer agreed to trades this failure for a worse one.
Notesnotes
Verbatim from the AWS campaign registration form: "The supported file type are PNG, JPEG, and PDF and the maximum file size is 500KB." Size is checked only where the registration carries upload metadata; a bare hosted URL gives us the file type from its extension and nothing about its weight, and the check says which of the two it settled rather than implying it checked both.
Rules you will hit next
Other campaign rules at the same severity. A registration is judged as a whole, not rule by rule.
CMP-003Message flow must not begin or end with whitespaceBlockingBLOCKINGCMP-017Every mandatory campaign attribute must be explicitly setBlockingBLOCKINGCMP-024Registration fields must be written in EnglishBlockingBLOCKINGCMP-035The description must describe this programme, not messaging in generalBlockingBLOCKINGCMP-037The description must name the business that sends the messagesBlockingBLOCKINGCMP-038Campaign fields must reference one company, not severalBlockingBLOCKING
CMP-028 is one of 94 campaign rules in the 915-rule 10DLC registry. Free to cite under CC BY 4.0.