Overview

Amazon’s VAT Calculation Service will now issue invoice numbers that are limited to 14 characters, a change that became active on January 1 2025. Sellers who rely on Amazon‑generated VAT invoices must verify that their bookkeeping tools can accommodate the shorter identifiers.

Key Points

• 14‑character limit — Invoice IDs are now capped at 14 alphanumeric characters, down from the previous variable‑length strings that could exceed 20 characters.
• Sequential integrity maintained — Despite the reduced length, each number remains unique and follows the original chronological order, preventing gaps in audit trails.
• Automatic implementation — The new format rolls out to every seller enrolled in the VAT Calculation Service without any manual opt‑in required.
• Cross‑market impact — The change applies uniformly across all European marketplaces where Amazon provides VAT invoices, including the UK, Germany, France, Italy and Spain.
• No effect on self‑generated invoices — Sellers who create their own VAT invoices using third‑party software are not directly impacted, although their partners may reference Amazon’s numbers.
• Potential system conflicts — Accounting platforms that enforce a maximum field length or use regex patterns based on the old format may reject the new 14‑character IDs until adjusted.

How the Change Works

1. Invoice generation — When a qualifying sale occurs, Amazon’s service creates a VAT invoice and assigns a 14‑character identifier, e.g., “DE20250000123”.
2. Number sequencing — The service continues the existing sequence, so the next invoice after “DE20250000123” becomes “DE20250000124”, preserving chronological order.
3. Data transmission – The shortened ID is included in the order‑level API response, the Seller Central download, and the PDF sent to the buyer, ensuring all downstream systems receive the same value.
4. Legacy handling – Historical invoices retain their original longer IDs; Amazon does not retroactively alter past records, which means reports will show a mix of old and new formats during the transition period.