# BT-78 Deliver to post code

Postal code of the delivery address.

## Quick answer

> **Delivery and payment**: Delivery dates, payment means, and the operational context around settlement.

- [Validate XML](/en/xrechnung-validator?source=resource&bt=BT-78)
- [Convert invoice](/en/pdf-to-xrechnung?source=resource&bt=BT-78)

## In plain language

Postal code of the delivery address.

Postal code of the delivery address.

The postal code makes the delivery destination machine-readable for routing, logistics, and matching.

## What you usually enter here

National postal code

Typical valid values include: 50667, 3011AA

Optional according to EN 16931-1.

## What goes wrong often

Avoid values like: , 123456789012345678901

## Examples in context

The postal code makes the delivery destination machine-readable for routing, logistics, and matching.

Optional according to EN 16931-1.

## Valid Examples

- 50667
- 3011AA

## Invalid Examples

- 123456789012345678901

## Related Fields

The postal code makes the delivery destination machine-readable for routing, logistics, and matching.

- [BT-75 Deliver to address line 1](/resources/xrechnung/bt-75-deliver-to-address-line-1)
- [BT-77 Deliver to city](/resources/xrechnung/bt-77-deliver-to-city)
- [BT-80 Deliver to country code](/resources/xrechnung/bt-80-deliver-to-country-code)

## 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-78

### Data Type:
text

### Cardinality:
0..1

### Requirement:
Optional

### Max Length:
20 characters

### Since Version:
Optional

## XML Implementation

### UBL 2.1 Syntax
```
/Invoice/cac:Delivery/cac:DeliveryLocation/cac:Address/cbc:PostalZone
```

### CII (UN/CEFACT) Syntax
```
/CrossIndustryInvoice/SupplyChainTradeTransaction/ApplicableHeaderTradeDelivery/ram:ShipToTradeParty/ram:PostalTradeAddress/ram:PostcodeCode
```

## Create an XRechnung from your PDF

The converter reads the invoice and shows the fields it found before download, so you can check and correct the values. No PDF? Fill in the XRechnung directly in the form.

- [Convert invoice](/en/pdf-to-xrechnung)
- [Fill in XRechnung in the form](/en/create-xrechnung)

Download requires an account. Subscriptions from €10/month with annual billing (excl. taxes), or €5 per conversion (excl. taxes) without a subscription.

## Why the standard cares about this field

### Business Context
The postal code makes the delivery destination machine-readable for routing, logistics, and matching.

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

## Official sources and tools

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