Back to the error catalogue
BR-DE-28BT-43
input
The seller contact email address is malformed
`Seller contact email address` (BT-43) should contain exactly one “at” sign, flanked by at least two characters on each side, and a dotted domain with no leading or trailing dot.
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
Like BR-DE-27, the check targets the field filled for appearances. It also catches the case where two addresses have been put in a field meant for one, separated by a comma or a semicolon.
How to fix it
Fill in a single valid address. Factlint does not correct it: splitting or choosing between two addresses would amount to deciding who gets the mail.