> For the complete documentation index, see [llms.txt](https://guides.clickatell.com/release-notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.clickatell.com/release-notes/release-notes-archive/2024-release-notes/q4-2024/channel-updates/whatsapp-no-support-for-hsm-template-format.md).

# WhatsApp: No support for HSM template format

Release date: 17 October 2024

Clickatell no longer supports the old WhatsApp HSM template format.

Meta deprecated support for HSMs several years ago and Clickatell has been converting this format in a manner that Meta understands since then. We are now officially ending our support of this format, and any template sent using the HSM structure will fail to deliver.

Please ensure your [message template structures](https://docs.clickatell.com/channels/one-api/one-api-reference/#tag/One-API/operation/sendMessages) are updated accordingly if not done yet.

<figure><img src="https://guides.clickatell.com/~gitbook/image?url=https%3A%2F%2F2478193595-files.gitbook.io%2F%7E%2Ffiles%2Fv0%2Fb%2Fgitbook-x-prod.appspot.com%2Fo%2Fspaces%252FwmGaDUQBZMvcoFPmfgvf%252Fuploads%252FjoTLFy90XRC86w7IDYLG%252Fimage.png%3Falt%3Dmedia%26token%3Dba919e63-d1ce-49d6-9c50-d73c451b2c4a&#x26;width=768&#x26;dpr=4&#x26;quality=100&#x26;sign=e850d475&#x26;sv=2" alt=""><figcaption></figcaption></figure>