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# Certificate settings

Use the **Certificates** tab to add and manage CA certificates and client certificates in Postman. Learn more about [managing certificates](/docs/sending-requests/authorization/certificates/).

Turn on the CA Certificates toggle to enable Postman to use CA certificates to [add your custom CA certificate](/docs/sending-requests/authorization/certificates#add-a-ca-certificate/) to Postman.

[Add your client certificate](/docs/sending-requests/authorization/certificates#add-a-client-certificate) to Postman to send requests to an API that uses mutual TLS authentication.