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BR-DE-7BT-43
input
The seller contact email address is missing
The `Seller contact email address` element (BT-43) must be provided.
Only the issuer holds this value: Factlint reports it and never fabricates it. Test your invoice to find out whether it is affected.
Why this error happens
Not to be confused with BT-34, the seller's electronic address for exchange purposes (checked by PEPPOL-EN16931-R020): BT-43 is a person's mailbox, BT-34 is the party's routing endpoint. Both are required, and conflating them always leaves one of the two empty.
How to fix it
Fill in the contact's address in the seller record. Factlint reports it as `needs_input` and never fabricates a default value.