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Also IFB. Generally, this term is equivalent to Request for Proposal or Invitation to Tender. However, in some application areas, it may have a narrower or more specific meaning. Invoice. Non-negotiable commercial instrument issued by a seller to a buyer. Also called a bill of sale or contract of sale, it identifies the both trading parties and lists, describes, and quantifies the items sold, shows the date of shipment and mode of transport, prices and discounts (if any), and delivery and payment terms. A typical invoice contains:

  • The word invoice (or Tax Invoice if in Australia and amounts include GST)
  • A unique reference number (in case of correspondence about the invoice)
  • Date of the invoice
  • Tax payments if relevant (e.g. GST and VAT)
  • Name and contact details of the seller
  • Tax or company registration details of seller (if relevant)
  • Name and contact details of the buyer
  • Date that the product was sent or delivered
  • Purchase order number (or similar tracking numbers requested by the buyer to be mentioned on the invoice)
  • Description of the product(s)
  • Unit price(s) of the product(s) (if relevant)
  • Total amount charged (optionally with breakdown of taxes, if relevant)
  • Payment terms (including method of payment, date of payment, and details about charges late payment)
  • The US Defense Logistics Agency requires an employer identification number on invoices.
  • The European Union requires a VAT (value added tax) identification number on invoices between entities registered for VAT.
  • If seller and buyer belong to two different EU countries, both VAT identification numbers must be on the invoice in order to claim VAT exemption.
  • In the UK, if the issuing entity is not registered for VAT, the invoice must state that it is “not a VAT invoice”.