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# SecTrustSettingsRemoveTrustSettings(_:_:)

Deletes the trust settings for a certificate.

```
func SecTrustSettingsRemoveTrustSettings(_ certRef: SecCertificate, _ domain: SecTrustSettingsDomain) -> OSStatus
```

## Parameters

`certRef`

The certificate whose trust settings you wish to remove. Pass the value [`kSecTrustSettingsDefaultRootCertSetting`](/documentation/Security/kSecTrustSettingsDefaultRootCertSetting) to remove the default root certificate trust settings for the domain.

`domain`

The trust settings domain for which you wish to remove the trust settings. For possible values, see [`SecTrustSettingsDomain`](/documentation/Security/SecTrustSettingsDomain).

## Return Value

A result code. See [Security Framework Result Codes](/documentation/Security/security-framework-result-codes). Returns [`errSecItemNotFound`](/documentation/Security/errSecItemNotFound) if no trust settings exist for the certificate.

## Discussion

If a certificate has no trust settings, the certificate must be verified to a known, trusted certificate.

---

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