# Exemption certificate

The `ExemptionCertificate` family — 6 operations.

An exemption certificate is captured proof that a purchase may go tax-free — the certificate number, the holder, the covered jurisdictions and categories, and any expiry. The capture is immutable; link it to the right org customer, revoke it if the issuer withdraws it, and expiry retires it on schedule.

## Operations

| Operation | Kind | What it does |
| --- | --- | --- |
| [createExemptionCertificate](/reference/exemption-certificate/createExemptionCertificate/) | mutation | Create a new customer’s tax-exemption certificate at your organization. |
| [doomExemptionCertificate](/reference/exemption-certificate/doomExemptionCertificate/) | mutation | Permanently retire a customer’s tax-exemption certificate. |
| [exemptionCertificate](/reference/exemption-certificate/exemptionCertificate/) | query | Look up one record — a customer’s tax-exemption certificate. |
| [exemptionCertificates](/reference/exemption-certificate/exemptionCertificates/) | query | The exemption certificate list — each entry is a customer’s tax-exemption certificate. |
| [revokeExemptionCertificate](/reference/exemption-certificate/revokeExemptionCertificate/) | mutation | Revoke a customer’s tax-exemption certificate — kill it now. |
| [updateExemptionCertificate](/reference/exemption-certificate/updateExemptionCertificate/) | mutation | Edit a customer’s tax-exemption certificate — change its details. |