> For the complete documentation index, see [llms.txt](https://docs.payengine.co/payengine-api-v2.5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payengine.co/payengine-api-v2.5/error-and-response-codes/universal-cardholder-authentication-field.md).

# Universal cardholder authentication field

<table><thead><tr><th width="150">Code</th><th>Description</th></tr></thead><tbody><tr><td>0</td><td>UCAF data is not supported by the merchant or the merchant has chosen not to send the indicator.</td></tr><tr><td>1</td><td>UCAF data collection is supported by the merchant and UCAF data was present and contained an attempted AAV for MasterCard SecureCard.</td></tr><tr><td>2</td><td>UCAF data collection is supported by the merchant and UCAF data was present and contained a fully authenticated AAV</td></tr><tr><td>5</td><td>Issuer Risk-Based Decisioning</td></tr><tr><td>6</td><td>Merchant Risk-Based Decisioning</td></tr><tr><td>7</td><td>Partial shipment</td></tr></tbody></table>