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A credit note is a document sent by the seller to the customer indicating that a credit has been made to their account.

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A Product exchange is the act of giving or taking a product in exchange of another.

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A Float is cash put into a cash box at the beginning of a week or day to allow change to be given to customers.

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A cheque is a document that orders the bank to pay a specific amount of money from a person's account to a person name the cheque has been issued.

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An electronic transaction is the sale or purchase of goods or services, whether between businesses, households, individuals, governments, and other public or private organisations, conducted over computer-mediated networks.

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A voucher is a form or a piece of supporting proof indicating a credit against future purchases or expenditures.

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A refund is a process in which a consumer returns a product to the original retailer in exchange for money previously paid

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A credit card purchase that a seller cancels after it has been authorized but before it has been settled. A void transaction does not appear on the customer's credit card statement, though it might appear in a list of pending transactions when the customer checks their account online.  A situation that might require a void transaction is if a grocery store customer who has just paid picks up her bags and realizes that the cashier accidentally included some of the next customer's items in her purchase.  The cashier could void the transaction, re-scan only the correct items and charge the customer the correct amount.

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Cash registers are used to record payment amounts and to handle cash throughout the business day. There are multiple types of cash registers, including electronic registers, Square iPad cash registers, and other computer-based registers. While each register has some unique features, they all share similarities in their operation.

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Payment Validation is about ensuring a business has the correct bank account details for the customers bank account or credit card details. Incorrect bank account data can lead to payments failing or fraud.

It is for businesses who wish to organise payments or direct debits or credit card payments to or from individuals or businesses.