---
id: "iso8583_rrn"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["finances"]
langs: ["common"]
quality: 60
url: "https://registry.apicrafter.io/datatype/iso8583_rrn"
---

# Retrieval reference number (RRN, ISO 8583) (`iso8583_rrn`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Reference number of a card transaction, data element 37 of an ISO 8583 message. It has 12 letters and digits. The acquirer sets it, and it stays the same in the request, the response and later reversals, so banks and merchants use it to find a payment.

- Personal data (PII): no
- Categories: Finances and banking (finances)
- Countries: global
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
^[A-Za-z0-9]{12}$
```

## Translations

- ru: Номер ссылки RRN (ISO 8583)

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/ISO_8583>

## Quality

Score 60/100. Missing: examples, negative example, mapping (Wikidata, Schema.org, ...), detector coverage.

JSON: <https://registry.apicrafter.io/api/v1/datatypes/iso8583_rrn.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/finances/iso8583_rrn.yaml>