# Company Identification Number (UID) Customs

*Last updated: 2026-06-18*

> Customs authorities and trade registries use a company identification number (UID) as a unique identifier to verify the identity of importing and exporting businesses in cross-border trade.

Customs authorities and trade registries use a company identification number (UID) as a unique identifier to verify the identity of importing and exporting businesses in cross-border trade. The number appears on customs declarations, import and export documents, and in electronic customs systems, and is frequently linked to the company's tax registration data. It underpins shipment traceability, compliance checks, and the correct allocation of duties and import VAT. In Switzerland, the UID is a nine-digit number prefixed with 'CHE'; in the EU, the EORI number serves a comparable function. Companies typically receive their UID automatically upon official registration.

**Source:** [https://www.uid.admin.ch](https://www.uid.admin.ch)

## Quick Facts

| Property | Value |
|---|---|
| Term | Company Identification Number (UID) Customs |
| Language | EN |
| Word count | 97 |
| Last updated | 2026-06-18 |
| Source | https://www.uid.admin.ch |

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