# F-INV044

Source: https://xmlvalid.com/rules/F-INV044

> Invalid EndpointID. Must contain a value

- Level: error
- Rule sets: OIOUBL 2.1 Invoice rules (Denmark) 1.17.2
- Context: `doc:Invoice/cac:AccountingCustomerParty/cac:Party`
- Test: `normalize-space(cbc:EndpointID) != ''`

Validate a document against these rules: https://xmlvalid.com/validate