How to prepare an invoice _ examples and introduction _ Information that should be included in an invoice includes: A generic invoice should contain: The word "invoice" A unique reference number (in case of correspondence about the invoice) Date of the invoice Name and contact details of the seller Tax or company registration details of seller (if relevant) Name and contact details of the buyer/ customer _ Purchaser's name or firm name Date that the product was sent or delivered or the service or services rendered,or the work that was done. Purchase order number (or similar tracking numbers requested by the buyer to be mentioned on the invoice) Description of the product(s) _(sales invoice) or of the services ( service invoice) 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) Discount,total before discount,and total after discount. (if relevant) Tax,total before tax,and total after tax. (if relevant) Shipping details if different from buyer details.The US Defense Logistics Agency requires an employer identification number on invoices.
About proforma invoice _ A Proforma invoice is an invoice provided by a supplier in advance of providing the goods or service. A quotation in the form of an invoice prepared by the seller that details items which would appear on a commercial invoice if an order results. It is more of a customs declaration form used in international trade that describes the parties involved in the shipping transaction, the goods being transported, and the value of the goods. It is the primary document to declare value for customs. It is not a true invoice, because the seller does not record a pro forma invoice as an accounts receivable and the buyer does not record a pro forma invoice as an accounts payable.