0108·Seller registration number is not in the correct format

What this means

Your own registration number is subject to identical formatting rules. Because it is usually configured once and then reused on every invoice, a formatting mistake here fails every submission rather than a single one.

Why it happens

• The number was entered into configuration with dashes or spaces.
• A branch or division identifier was appended to the registration number.
• The wrong entity's number was configured on a multi-entity setup.

How to fix it

1. 1Strip formatting from the configured registration number and verify its length.
2. 2Confirm the number matches the entity that actually holds the digital invoicing registration.
3. 3Test with a single validate call after changing it — a bad value blocks everything.

Related errors

• 0002Buyer registration number is not in the correct format
• 0082The seller is not registered for sales tax
• 0083Seller registration number does not match