The buyer's electronic address is missing
BT-49 carries the buyer's electronic address, which routes the invoice to their platform.
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
This address is how the recipient's platform is found in the directory. Without it the invoice is syntactically correct but cannot be routed — a rejection downstream, not at generation time.
How to fix it
Fill in the electronic address agreed with your customer, together with its identification scheme. It belongs to the commercial relationship and cannot be derived from any other field.
Severity returned by the rule set
The text of the rule says “mandatory”, but the rule set in force (BR-FR Flux 2, V1.3.0) classifies the breach as a warning while the reform ramps up: the API returns `severity: "warning"`, faithful to the pinned rule set. An in-scope warning still rules out a “compliant” verdict — at best the invoice comes out as `needs_input` — and the rule is expected to become blocking in a later version of the rule set.