[BII2-T10-R025]-Each document level allowance or charge details MUST have an allowance and charge reason text [BII2-T10-R043]-Document level allowances and charges details MUST have allowance and charge VAT category if the invoice has a VAT total amount [BII2-T10-R001]-An invoice MUST have a customization identifier [BII2-T10-R002]-An invoice MUST have a business profile identifier [BII2-T10-R003]-An invoice MUST have an invoice identifier [BII2-T10-R004]-An invoice MUST have an invoice issue date [BII2-T10-R005]-An invoice MUST specify the currency code for the document [BII2-T10-R006]-An invoice MUST have a seller name and/or a seller identifier [BII2-T10-R008]-An invoice MUST have a buyer name and/or a buyer identifier [BII2-T10-R010]-An invoice MUST have the sum of line amounts [BII2-T10-R011]-An invoice MUST have the invoice total without VAT [BII2-T10-R012]-An invoice MUST have the invoice total with VAT (value of purchase) [BII2-T10-R013]-An invoice MUST have the amount due for payment [BII2-T10-R014]-An invoice MUST have at least one invoice line [BII2-T10-R015]-An invoice MUST specify the VAT total amount, if there are VAT line amounts [BII2-T10-R026]-An invoice MUST contain VAT category details unless VAT total amount is omitted. [BII2-T10-R044]-A seller VAT identifier MUST be provided if the invoice has a VAT total amount [BII2-T10-R047]-A buyer VAT identifier MUST be present if the VAT category code is reverse VAT [BII2-T10-R049]-The invoice total without VAT MUST be equal to the VAT category taxable amount if the VAT category code is reverse charge [BII2-T10-R050]-The VAT category tax amount MUST be zero if the VAT category code is reverse charge (since there is only one VAT category allowed it follows that the invoice tax total for reverse charge invoices is zero) [BII2-T10-R048]-An invoice with a VAT category code of reverse charge MUST NOT contain other VAT categories. [BII2-T10-R017]-Each invoice line MUST have an invoice line identifier [BII2-T10-R018]-Each invoice line MUST have an invoiced quantity [BII2-T10-R019]-Each invoice line MUST have a quantity unit of measure [BII2-T10-R020]-Each invoice line MUST have an invoice line net amount [BII2-T10-R021]-Each invoice line MUST have an invoice line item name and/or the invoice line item identifier [BII2-T10-R032]-A scheme identifier for the invoice line item registered identifier MUST be provided if invoice line item registered identifiers are used to identify a product.(e.g. GTIN) [BII2-T10-R033]-A scheme identifier for a invoice line item commodity classification MUST be provided if invoice line item commodity classification are used to classify an invoice line item (e.g. CPV or UNSPSC) [BII2-T10-R023]-Each invoice period information MUST have an invoice period start date [BII2-T10-R024]-Each invoice period information MUST have an invoice period end date [BII2-T10-R031]-An invoice period end date MUST be later or equal to an invoice period start date [BII2-T10-R039]-An account identifier MUST be present if payment means type is funds transfer [BII2-T10-R040]-A sellers financial institution identifier MUST be provided if the scheme of the account identifier is IBAN and the payment means is international bank transfer [BII2-T10-R041]-A payment means MUST specify the payment means type [BII2-T10-R042]-A sellers financial institution identifier scheme MUST be BIC if the scheme of the account identifier is IBAN and the payment means type is international account transfer [BII2-T10-R051]-Sum of line amounts MUST equal the invoice line net amounts [BII2-T10-R052]-An invoice total without VAT MUST equal the sum of line amounts plus the sum of charges on document level minus the sum of allowances on document level [BII2-T10-R053]-An invoice total with VAT MUST equal the invoice total without VAT plus the VAT total amount and the rounding of invoice total [BII2-T10-R054]-The sum of allowances at document level MUST be equal to the sum of document level allowance amounts [BII2-T10-R055]-The sum of charges at document level MUST be equal to the sum of document level charge amounts [BII2-T10-R056]-Amount due for payment MUST be equal to the invoice total amount with VAT minus the paid amounts [BII2-T10-R058]-Invoice total without VAT MUST be equal to the sum of VAT category taxable amounts [BII2-T10-R027]-Each VAT category details MUST have a VAT category taxable amount [BII2-T10-R028]-Each VAT category details MUST have a VAT category tax amount [BII2-T10-R029]-Every VAT category details MUST be defined through a VAT category code [BII2-T10-R030]-The VAT category percentage MUST be provided if the VAT category code is standard.