HAP1650-5f

The assignee's tax number (FactoringAssignmentData/Assignee) is the seller's (…); they must differ.

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Context
/*:Facturae
Test
not($assignee) or upper-case(normalize-space($assignee)) != upper-case($seller)

Checked with Facturae 3.2.2