Shopify Payments - Invalid Format

Topic summary

A user is encountering an “invalid format” error when attempting to enter their VAT number during Shopify Payments setup. The error message appears in German (“ungültiges format”), and a screenshot has been provided to illustrate the issue.

Suggested troubleshooting steps:

  • Review all gateway credentials and account details for potential input errors
  • Verify that the VAT number format matches the expected requirements
  • Contact Shopify support directly with the screenshot and relevant account information if the issue persists

The problem appears to stem from either incorrect credential formatting or potential gateway configuration issues. The discussion remains open with no confirmed resolution yet.

Summarized with AI on October 26. AI used: claude-sonnet-4-5-20250929.

Hello together,

I currently try to setup shopify payments. When I try to enter my VAT I get invalid format/ungültiges format.

See the attached screenshot.

Is there any solution to this?

https://prnt.sc/G-wT5cDE7Byf

Hello there @lisacardellino from my experience and research, this is usually caused by gateway issues and details such as the credentials for accounts used. So my first suggestion is to review all these necessary stuff to be sure that no mistake of any sort was made there.
If that doesn’t work, then you should reach out to Shopify support with the screenshot and other necessary details.