# Revoke a certificate

Source: https://developer.avalara.com/products/ecm/integration-guides/document-management/oas0801600897334/

Guide: Exemption Certificate Management (ECM)

# Revoke a certificate

Learn how to remove an exemption certificate from a customer when it expires or is no longer applicable.

**Element type:** Suggested

**Endpoints/Models used:** [UnlinkCertificatesFromCustomer](https://developer.avalara.com/api-reference/avatax/rest/v2/methods/Customers/UnlinkCertificatesFromCustomer/), [UnlinkCustomersFromCertificate](https://developer.avalara.com/api-reference/avatax/rest/v2/methods/Certificates/UnlinkCustomersFromCertificate/)

As exemption certificates expire or no longer apply to a customer, your integration must provide a function to remove a certificate from that customer.

Notice

A [DeleteCertificate API](https://developer.avalara.com/api-reference/avatax/rest/v2/methods/Certificates/DeleteCertificate/) is available to remove a certificate from ECM. Use caution when running this API. It’s possible that a certificate is linked to multiple customers, so deleting a certificate will remove it from all customers.

-   **[UnlinkCertificateFromCustomer](/document-management/qmg1801152409987/)**  
    Learn how to use the UnlinkCertificatesFromCustomer API to remove certificates from a customer.
-   **[UnlinkCustomersFromCertificate](/document-management/nmc6563599222666/)**  
    Learn how to use the UnlinkCustomersFromCertificate API to remove customers from a certificate.