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| Attribute | Mandatory | Format | Description | Example |
|---|---|---|---|---|
| CustomerNumber | M | Integer [1-8] | Customer number as known at PostNL Pakketten | 1234567 |
| CustomerCode | M | String [1-4] | Customer code as known at PostNL Pakketten | ABCD |
| (Test | Live) Username | M | String | Username known at PostNL to make use of the API | dev-12345 |
| (Test | Live) Password | M | String | Password for the PostNL user required to use the API | pwd-12345 |
| CollectionLocation | M | String | Code of delivery location at PostNL Pakketten If unsure what to enter please consult with PostNL | 123456 |
| Globalpack | O | String | Code of globalpack product used for the PostNL account Only required when sending packages outside of the EU If unsure what to enter please consult with PostNL | 1660 |
| IBAN | O | String | Only required when using Cash on Delivery shipping option | NL39 RABO 0300 0652 64 |
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