# BR-CL-16 Payment means code must come from UNCL4461

The payment means type code (BT-81) must be coded using the UNCL4461 code list.

## Problem Description

The payment means type code (BT-81) must be coded using the UNCL4461 code list.

> **ERROR**: XRechnung 3.0

## Context and Significance

This EN16931 core code-list rule lets the payer route the payment according to a standard method.

## Solution

Set BT-81 to a valid UNCL4461 code, e.g. 30 (credit transfer), 58 (SEPA credit transfer), 59 (SEPA direct debit) or 48 (bank card).

- validate
- convert

## Valid Examples

- BT-81 = 58 — SEPA credit transfer
- BT-81 = 59 — SEPA direct debit

## Invalid Examples

- BT-81 = 999 — not a UNCL4461 code
- BT-81 = SEPA — free text instead of a code

## Code Examples

### Valid XML
```
<cac:PaymentMeans>
  <cbc:PaymentMeansCode>58</cbc:PaymentMeansCode>
</cac:PaymentMeans>
```

### Invalid XML
```
<cac:PaymentMeans>
  <cbc:PaymentMeansCode>999</cbc:PaymentMeansCode>
</cac:PaymentMeans>
```

## Affected Fields

- [BT-81 Payment means type code](/resources/xrechnung/bt-81-payment-means-type-code)

## Related Rules

- [BR-61](/resources/kosit-validator-errors/br-61-credit-transfer-account-required)

## Validation Tools

- [Official KoSIT Validator](https://erechnungsvalidator.service-bw.de/): Validate your XRechnung files against all BR-DE rules.
- [Convert PDF to XRechnung](/pdf-to-xrechnung): Automatic validation error fixes when converting.

## Related Resources

- [Official Specification](https://xeinkauf.de/xrechnung/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)
- [Complete Error List](/resources/kosit-validator-errors): Overview of all German XRechnung validation rules.