Types of debit card systems

There are currently three ways that debit card transactions are processed: online debit (also known as PIN debit), offline debit (also known as signature debit) and the Electronic Purse Card System.
It should be noted that one physical card can include the functions of an online debit card, an offline debit card and an electronic purse card.

Although many debit cards are of the Visa or MasterCard brand, there are many other types of debit card, each accepted only within a particular country or region, for example Switch (now: Maestro) and Solo in the United Kingdom, Interac in Canada, Carte Bleue in France, Laser in Ireland, "EC electronic cash" (formerly Eurocheque) in Germany and EFTPOS cards in Australia and New Zealand. The need for cross-border compatibility and the advent of the euro recently led to many of these card networks (such as Switzerland's "EC direkt", Austria's "Bankomatkasse" and Switch in the United Kingdom) being re-branded with the internationally recognised Maestro logo, which is part of the MasterCard brand. Some debit cards are dual branded with the logo of the (former) national card as well as Maestro (e.g. EC cards in Germany, Laser cards in Ireland, Switch and Solo in the UK, Pinpas cards in the Netherlands, Bancontact cards in Belgium, etc.). The use of a debit card system allows operators to package their product more effectively while monitoring customer spending. An example of one of these systems is ECS by Embed International.

Online Debit System

Online debit cards require electronic authorization of every transaction and the debits are reflected in the user’s account immediately. The transaction may be additionally secured with the personal identification number (PIN) authentication system and some online cards require such authentication for every transaction, essentially becoming enhanced automatic teller machine (ATM) cards. One difficulty in using online debit cards is the necessity of an electronic authorization device at the point of sale (POS) and sometimes also a separate PINpad to enter the PIN, although this is becoming commonplace for all card transactions in many countries. Overall, the online debit card is generally viewed as superior to the offline debit card because of its more secure authentication system and live status, which alleviates problems with processing lag on transactions that may only issue online debit cards. Some on-line debit systems are using the normal authentication processes of Internet banking to provide real-time on-line debit transactions. The most notable of these are Ideal and POLi.

Offline Debit System

Offline debit cards have the logos of major credit cards (e.g. Visa or MasterCard) or major debit cards (e.g. Maestro in the United Kingdom and other countries, but not the United States) and are used at the point of sale like a credit card (with payer's signature). This type of debit card may be subject to a daily limit, and/or a maximum limit equal to the current/checking account balance from which it draws funds. Transactions conducted with offline debit cards require 2–3 days to be reflected on users’ account balances. In some countries and with some banks and merchant service organizations, a "credit" or offline debit transaction is without cost to the purchaser beyond the face value of the transaction, while a small fee may be charged for a "debit" or online debit transaction (although it is often absorbed by the retailer). Other differences are that online debit purchasers may opt to withdraw cash in addition to the amount of the debit purchase (if the merchant supports that functionality); also, from the merchant's standpoint, the merchant pays lower fees on online debit transaction as compared to "credit" (offline) debit transaction.

Electronic Purse Card System

Smart-card-based electronic purse systems (in which value is stored on the card chip, not in an externally recorded account, so that machines accepting the card need no network connectivity) are in use throughout Europe since the mid-1990s, most notably in Germany (Geldkarte), Austria (Quick), the Netherlands (Chipknip), Belgium (Proton), Switzerland (CASH) and France (Mon€o, which is usually carried by a debit card). In Austria and Germany, all current bank cards now include electronic purses.

Prepaid Debit Card

Prepaid debit cards, also called reloadable debit cards or reloadable prepaid cards, are often used for recurring payments.
The payer loads funds to the cardholder's card account. Prepaid debit cards use either the offline debit system or the online debit system to access these funds. Particularly for companies with a large number of payment recipients abroad, prepaid debit cards allow the delivery of international payments without the delays and fees associated with international checks and bank transfers.
Providers include Caxton FX prepaid cards,
Escape prepaid cards, Travelex prepaid cards
And Transcash prepaid cards
Whereas, web-based services such as stock photography websites (istockphoto), outsourced services (oDesk), and affiliate networks (MediaWhiz) have all started offering prepaid debit cards for their contributors/freelancers/vendors.