> For the complete documentation index, see [llms.txt](https://docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.verifone.com/functional-specification/validate_scheme_by_merchant.md).

# validate\_scheme\_by\_merchant

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Scheme Validator Based on Merchant
{% endcolumn %}

{% column %}
**Description**

The configuration contains the schemes that are supported by the merchant. The scheme of the card presented is checked against the schemes supported by the merchant. If the scheme is not supported by the merchant, the card will be declined.

\
**Configuration Parameters**

Each merchant’s configuration specifies the schemes that are supported by the merchant

\
**Error Scenarios**

If the scheme is not supported by the merchant, the transaction is declined
{% endcolumn %}
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