# CII-SR-495

Source: https://xmlvalid.com/rules/CII-SR-495

> An Invoice shall contain maximum one Payment Card account (BG-18).

- Level: error
- Rule sets: EN 16931 rules (CII) 1.3.17
- Context: `/rsm:CrossIndustryInvoice`
- Test: `count(//ram:SpecifiedTradeSettlementPaymentMeans/ram:ApplicableTradeSettlementFinancialCard) <= 1`

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