# BR-CIUS-PT-36

Source: https://xmlvalid.com/rules/BR-CIUS-PT-36

> The Seller contact point (BT-41) or the Seller contact telephone number (BT-42) or the Seller contact email address (BT-43) shall be filled.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `cac:AccountingSupplierParty`
- Test: `exists(cac:Party/cac:Contact) and (not(cac:Party/cac:Contact/cbc:Name) and not(cac:Party/cac:Contact/cbc:Telephone) and not(cac:Party/cac:Contact/cbc:ElectronicMail))`

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