Payment systems

3-D Secure is an XML-based protocol designed to be an additional security layer for online credit and debit card transactions.

A debit card (also known as a bank card or check card) is a plastic payment card that can be used instead of cash when making purchases.

Electronic money, or e-money, is the money balance recorded electronically on a stored-value card.

A postal order is a financial instrument usually intended for sending money through the mail.

A negotiable instrument is a document guaranteeing the payment of a specific amount of money, either on demand, or at a set time, with the payer named on the document.

A voucher is a bond of the redeemable transaction type which is worth a certain monetary value and which may be spent only for specific reasons or on specific goods.

A stored-value card is a payments card with a monetary value stored on the card itself, not in an external account maintained by a financial institution.

A letter of credit is a document, typically from a bank (issuing bank), assuring that a seller (beneficiary) will receive payment up to the amount of the letter of credit, as long as certain documentary delivery conditions have been met.

A virtual currency or virtual money has been defined in 2012 by the European Central Bank as "a type of unregulated, digital money, which is issued and usually controlled by its developers, and used and accepted among the members of a specific virtual community.

A giro (/ˈdʒaɪəroʊ/, /ˈdʒɪroʊ/, /ˈʒɪroʊ/, /ˈdʒɪəroʊ/, or /ˈʒɪəroʊ/), or giro transfer, is a payment transfer from one bank account to another bank account and instigated by the payer, not the payee.

Crowdfunding is the practice of funding a project or venture by raising monetary contributions from a large number of people.

Manual fare collection is the practice of collecting fares manually (without the aid of an automated machine).

Prepaid refers to services paid for in advance.

A money order is a payment order for a pre-specified amount of money.

The threshold pledge or fund and release system is a way of making a fundraising pledge as a group of individuals, often involving charitable goals or financing the provision of a public good.

The TRANZ 330 is a popular point-of-sale device manufactured by VeriFone in 1985.

Disney's Fastpass (known as FastPass+ in the Walt Disney World Resort in Florida) is a virtual queuing system created by the Walt Disney Company.

A truck system is an arrangement in which employees are paid in commodities or some currency substitute (such as vouchers or token coins, called in some dialects scrip or chit) rather than with standard currency.