---
title: "PaymentInformationId"
canonical: "https://openfinanceguide.com/en/stet/1.6.3/resources/payment-information-id"
edition: "STET PSD2 API 1.6.3.1"
source: "https://openfinanceguide.com/docs/stet/1.6.3/pdf/api-dsp2-stet-v1.6.3.2-openapi.yaml"
pdf: "https://openfinanceguide.com/docs/stet/1.6.3/pdf/api-dsp2-stet-v1.6.3.1-part-2-functional-model.pdf"
language: "en"
normative: "The normative text is the English PDF and OpenAPI file published by STET. This Markdown reproduces it for reading; where they differ, the PDF prevails."
license: "CC BY 3.0 FR (https://creativecommons.org/licenses/by/3.0/fr/), STET. Converted to Markdown by Open Finance Guide."
---

# PaymentInformationId

Type: `string` · Kind: ISO20022 · Constraints: pattern `^([a-zA-Z0-9 /\-?:\()\.,']{1,36})$`

ISO20022: Reference assigned by a sending party to unambiguously identify the payment information block within the message.
API: This field is a clue for idempotency check by the ASPSP in order to avoid duplicate SCA or payment execution. However the ASPSP may use other mechanisms.

## Example

```json
"string"
```

## Used by

- `POST /payment-requests/{paymentRequestResourceId}/confirmation` (paymentRequestConfirmationPost)
- `PUT /payment-requests/{paymentRequestResourceId}` (paymentRequestPut)
- `GET /payment-requests/{paymentRequestResourceId}` (paymentRequestsGet)
- `POST /payment-requests` (paymentRequestsPost)