# Adyen payment identifiers

Adyen can supply PAR for terminal and online card payments, and the customer's
full IBAN for supported bank-payment flows when returned for your account.
These identifiers can support automatic
[recipient resolution](/receipts/recipient-resolution) when they match a Cheqi user.

## Enable PAR for card payments

1. Log in to the Adyen Customer Area for the account processing your payments.
2. Go to **Developers → Additional data**.
3. Under **Acquirer**, enable **Payment account reference**.
4. If you receive identifiers through standard webhooks, also enable
**Add Payment Account Reference** in the webhook's additional settings.


Adyen's [card and shopper identifiers documentation](https://docs.adyen.com/point-of-sale/card-acquisition/identifiers/)
covers Terminal API and ecommerce PAR availability. PAR is returned only when
available for the transaction. See also
[standard webhook settings](https://docs.adyen.com/development-resources/webhooks/webhook-types/additional-settings).

Pass an available PAR to
`IdentificationDetails.cardDetails.paymentAccountReference`.

## Full IBAN for bank payments

For bank payments such as iDEAL, use the customer's full IBAN when Adyen
returns it. Cheqi's integration reads `additionalData.iban`,
`additionalData["bankAccount.iban"]`, or `iban`. Confirm the field returned
for your integration; not every payment method returns customer bank details.

If the IBAN is missing, ask Adyen to include customer bank details for your
account and payment flow. Pass a returned full IBAN to
`IdentificationDetails.paymentAccountDetails.identifier`, with
`accountIdentifierType: "IBAN"`. A masked IBAN or suffix cannot support this
automatic matching.

## QR collection with last four card digits

Adyen supports last-four card details. Include them in the encrypted receipt's
`ReceiptPayload.paymentDetails.cardLastFour` and offer the receipt QR code when
download fallback is enabled.

See [QR collection with the last four card digits](/receipts/payment-provider-compatibility#qr-collection-with-the-last-four-card-digits)
for the required receipt input, or return to
[Payment Provider Compatibility](/receipts/payment-provider-compatibility) for
coverage across providers.