> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/tokenization/implement-tokenization/card-tokenization-request/processing-the-decision/decision-engine/data-validation-codes/verification-codes.md).

# Verification codes

## Verification codes

Verification codes describe the checks D1 performs on data provided by the token requestor and the Issuer.

### Code groups

D1 groups verification codes into the following categories:

* **Token requestor**: checks data provided by the token requestor.
* **End user name**: checks the end user name against the cardholder name.
* **End user billing address**: checks the billing address provided by the wallet against the billing address provided by the Issuer.
* **End user phone number**: checks the phone number provided by the wallet against the phone number provided by the Issuer.
* **End user language**: checks the language provided by the wallet against the language provided by the Issuer.
* **End user localization**: checks the localization provided by the wallet, including coordinates and IP address, against localization data derived from the billing address provided by the Issuer.

The following table lists all verification codes.

### Code structure

A verification code uses a prefix to identify the data source:

* `TR_`: the data is provided by the token requestor.
* `ISS_`: the data is provided by the Issuer.
* No prefix: D1 compares data provided by both the token requestor and the Issuer.

A verification code uses a suffix to identify the result:

* `UNAVAILABLE`: the data is not available.
* `MATCH`: both values are provided and match.
* `NO_MATCH`: both values are provided and do not match.
* `PARTIAL_MATCH`: both values are provided and only part of the data matches.
* `INVALID`: the data is available, but its format is invalid.

<table><thead><tr><th width="436.272705078125">Verification code</th><th width="302.4544677734375">Category</th></tr></thead><tbody><tr><td><p>TR_RECOMMENDATION-UNAVAILABLE</p><p>TR_DEVICE_SCORE-UNAVAILABLE</p><p>TR_ACCOUNT_SCORE-UNAVAILABLE</p></td><td>Token requestor</td></tr><tr><td><p>NAME-MATCH</p><p>NAME-NO_MATCH</p><p>NAME-PARTIAL_MATCH</p><p>TR_NAME-UNAVAILABLE</p></td><td>End user name</td></tr><tr><td><p>ADDRESS-MATCH</p><p>ADDRESS-NO_MATCH</p><p>ADDRESS-PARTIAL_MATCH</p><p>ADDRESS_LINE1-NO_MATCH</p><p>ADDRESS_LINE2-NO_MATCH</p><p>ADDRESS_ZIPCODE-NO_MATCH</p><p>ADDRESS_COUNTRYCODE-NO_MATCH</p><p>TR_ADDRESS-UNAVAILABLE</p><p>TR_ADDRESS-INVALID</p><p>ISS_ADDRESS-UNAVAILABLE</p><p>ISS_ADDRESS-INVALID</p></td><td>End user billing address</td></tr><tr><td><p>PHONE_NUMBER-PARTIAL_MATCH</p><p>PHONE_NUMBER-MATCH</p><p>PHONE_NUMBER-NO_MATCH</p><p>TR_PHONE_NUMBER-UNAVAILABLE</p><p>TR_PHONE_NUMBER-INVALID</p><p>ISS_PHONE_NUMBER-UNAVAILABLE</p><p>ISS_PHONE_NUMBER-INVALID</p></td><td>End user phone number</td></tr><tr><td><p>LANGUAGE-MATCH</p><p>LANGUAGE-NO_MATCH</p><p>TR_LANGUAGE-UNAVAILABLE</p><p>TR_LANGUAGE-INVALID</p><p>ISS_LANGUAGE-UNAVAILABLE</p><p>ISS_LANGUAGE-INVALID</p></td><td>End user language</td></tr><tr><td><p>LOCALIZATION-MATCH</p><p>LOCALIZATION-NO_MATCH</p><p>LOCALIZATION-PARTIAL_MATCH</p><p>TR_LOCALIZATION-UNAVAILABLE</p><p>TR_LOCALIZATION-INVALID</p><p>ISS_LOCALIZATION-UNAVAILABLE</p><p>ISS_LOCALIZATION-INVALID</p><p>TR_IPADDRESS-UNAVAILABLE</p><p>TR_IPADDRESS-INVALID</p></td><td>End user localization</td></tr></tbody></table>

{% hint style="warning" %}
The quality of the verifications depends on the data made available by both the wallet and the Issuer.
{% endhint %}


---

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