the date of issue

invoice number

the supplier’s full name and address

the supplier’s VAT identification number

the supplier bank account details – IBAN and SWIFT code or the complete bank account number – should also appear on invoices. Payment slips are not necessary

CERN name and address

the CERN order number(s) or CERN contract number or lacking that your technician contact at CERN

a description of the quantity and nature of the goods supplied or services rendered

the date of the supply

the VAT rate applied

the VAT amount payable

a break-down of the VAT amount payable per VAT rate or exemption

the unit price of the goods or services exclusive of tax, discounts or rebates (unless included in the unit price)