---
title: SKAdTestError.Code.missingSignature
framework: storekittest
role: symbol
role_heading: Case
path: storekittest/skadtesterror/code/missingsignature
---

# SKAdTestError.Code.missingSignature

The signature for the ad is missing, in the testing environment.

## Declaration

```swift
case missingSignature
```

## Discussion

Discussion Check that you provide a signature in validate(_:publicKey:) or validateImpression(parameters:publicKey:).

## See Also

### Signature Errors

- [SKAdTestError.Code.signatureInvalidKey](storekittest/skadtesterror/code/signatureinvalidkey.md)
- [SKAdTestError.Code.signatureInvalidOrder](storekittest/skadtesterror/code/signatureinvalidorder.md)
- [SKAdTestError.Code.signatureMissingAdNetworkId](storekittest/skadtesterror/code/signaturemissingadnetworkid.md)
- [SKAdTestError.Code.signatureMissingAppAdamId](storekittest/skadtesterror/code/signaturemissingappadamid.md)
- [SKAdTestError.Code.signatureMissingFidelityType](storekittest/skadtesterror/code/signaturemissingfidelitytype.md)
- [SKAdTestError.Code.signatureMissingNonce](storekittest/skadtesterror/code/signaturemissingnonce.md)
- [SKAdTestError.Code.signatureMissingSourceAppAdamId](storekittest/skadtesterror/code/signaturemissingsourceappadamid.md)
- [SKAdTestError.Code.signatureMissingSourceDomain](storekittest/skadtesterror/code/signaturemissingsourcedomain.md)
- [SKAdTestError.Code.signatureMissingSourceIdentifier](storekittest/skadtesterror/code/signaturemissingsourceidentifier.md)
- [SKAdTestError.Code.signatureMissingTimestamp](storekittest/skadtesterror/code/signaturemissingtimestamp.md)
- [SKAdTestError.Code.signatureUnknownError](storekittest/skadtesterror/code/signatureunknownerror.md)
- [SKAdTestError.Code.signatureVerificationFailed](storekittest/skadtesterror/code/signatureverificationfailed.md)
- [SKAdTestError.Code.signatureInvalidKey](storekittest/skadtesterror/code/signatureinvalidkey.md)
- [SKAdTestError.Code.signatureInvalidOrder](storekittest/skadtesterror/code/signatureinvalidorder.md)
- [SKAdTestError.Code.signatureMissingAdNetworkId](storekittest/skadtesterror/code/signaturemissingadnetworkid.md)