# BT-15 Receiving advice reference

Reference to the receiving advice issued by the buyer or receiving location.

## Quick answer

Reference to the receiving advice issued by the buyer or receiving location.

> **Invoice basics**: Core document identifiers, dates, process identifiers, and high-level invoice context.

## In plain language

Reference to the receiving advice issued by the buyer or receiving location.

Reference to the receiving advice issued by the buyer or receiving location.

Use this field when the invoice should point to a formal goods receipt or service acceptance confirmation.

## What you usually enter here

Receipt or acceptance reference

Typical valid values include: GRN-2026-991

Optional according to EN 16931-1.

## What goes wrong often

Avoid values like: , AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Examples in context

Use this field when the invoice should point to a formal goods receipt or service acceptance confirmation.

Optional according to EN 16931-1.

## Valid Examples

- GRN-2026-991

## Invalid Examples

- AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

## Related Fields

Use this field when the invoice should point to a formal goods receipt or service acceptance confirmation.

- [BT-75 Deliver to address line 1](/resources/xrechnung/bt-75-deliver-to-address-line-1)
- [BT-76 Deliver to address line 2](/resources/xrechnung/bt-76-deliver-to-address-line-2)

## XML mapping and field facts

Open the technical reference if you need XML paths, validator rule codes, legal wording, or schema-specific mapping details.

### Field ID:
BT-15

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
50 characters

### Since Version:
Optional

## XML Implementation

### UBL 2.1 Syntax
```
/Invoice/cac:ReceiptDocumentReference/cbc:ID
```

### CII (UN/CEFACT) Syntax
```
/CrossIndustryInvoice/SupplyChainTradeTransaction/ApplicableHeaderTradeDelivery/ram:ReceivingAdviceReferencedDocument/ram:IssuerAssignedID
```

## Why the standard cares about this field

### Business Context
Use this field when the invoice should point to a formal goods receipt or service acceptance confirmation.

### Legal Requirement
Optional according to EN 16931-1.

## Official sources and tools

- [KoSIT Validator](https://erechnungsvalidator.service-bw.de/)
- [Invoice Converter](/pdf-to-xrechnung)
- [XRechnung Standard](https://xeinkauf.de/xrechnung/)
- [Test Suite](https://github.com/itplr-kosit/xrechnung-testsuite)