---
title: AdAttributionKitError.conversionTagNotSupported
framework: AdAttributionKit
role: symbol
role_heading: Case
platforms: [iOS 18.4+, iPadOS 18.4+, Mac Catalyst 18.4+]
path: adattributionkit/adattributionkiterror/conversiontagnotsupported
---

# AdAttributionKitError.conversionTagNotSupported

The postback update failed due to an unsupported use of conversion tag

## Declaration

```swift
case conversionTagNotSupported
```