to invoices. Self-billing invoice - A self billing invoice'' is used when a buyer issues the invoice to themselves (e.g. according to the consumption levels he is taking out of a vendor-managed inventory stock). The buyer (i.e. the issuer) should treat the invoice as an account payable and the seller should treat it as an account receivable. If there is tax on the sale, e.g. VAT or GST, then the buyer and seller may need to adjust their tax accounts in accordance with tax legislation. Under Article 224 of the EU VAT Directive, self-billing processes may only be used "if there is a prior agreement between the two parties and provided that a procedure exists for the acceptance of each invoice" by the supplier. A Self-Billing Agreement will usually provide for the supplier not to issue their own sales invoices as well. Evaluated receipt settlement (ERS) - ERS is a process of paying for goods and services from a packing slip rather than from a separate invoice document. The payee uses data in the packing slip to apply for the payments. "In an ERS transaction, the supplier ships goods based upon an Advance Shipping Notice (ASN), and the purchaser, upon receipt, confirms the existence of a corresponding purchase order or contract, verifies the identity and quantity of the goods, and then pays the supplier." Timesheet - Invoices for hourly services issued by businesses such as lawyers and consultants often pull data from a timesheet. A timesheet invoice may also be generated by Operated equipment rental companies where the invoice will be a combination of timesheet based charges and equipment rental charges. Statement - A periodic customer statement includes opening balance, invoices, payments, credit memos, debit memos, and ending balance for the customer's account during a specified period. A monthly statement can be used as a summary invoice to request a single payment for accrued monthly charges. Progress billing used to obtain partial payment on extended contracts, particularly in the construction industry (see Schedule of values) Collective Invoicing is also known as monthly invoicing in Japan. Japanese businesses tend to have many orders with small amounts because of the outsourcing system (Keiretsu), or of demands for less inventory control (Kanban). To save the administration work, invoicing is normally processed on monthly basis. Continuation or Recurring Invoicing is standard within the equipment rental industry, including tool rental. A recurring invoice is one