# Authentication Context Class References (ACR)

Aritma ID supports a few `acr_values` that helps you control how the
authentication process is executed.

| Value | Description |
|  --- | --- |
| `mfa` | Triggers a mfa input even if the user has already done a mfa login, used when an API call requires a recent mfa |
| `verify` | Makes the user re-verify their identity using BankID, used when an API call is rejected with "verify" reason |