Postal savings system
Many nations' post offices operated or continue to operate postal savings systems to provide depositors who do not have access to banks a safe, convenient method to save money and to promote saving among the poor.
The first nation to offer such an arrangement was Great Britain in 1861. It was vigorously supported by Sir Rowland Hill, who successfully advocated the penny post, and William Ewart Gladstone, then Chancellor of the Exchequer, who saw it as a cheap way to finance the public debt. At the time, banks were mainly in the cities and largely catered to wealthy customers. Rural citizens and the poor had no choice but to keep their funds at home or on their persons.
The original Post Office Savings Bank was limited to deposits of £30 a year with a maximum balance of £150. Interest was paid at the rate of two and one-half percent per year on whole pounds in the account. Later the limits were raised to a maximum of £500 a year in deposits and no limit on the total. Within five years of the establishment of the system there were over 600,000 accounts and £8.2 million on deposit. By 1927, there were twelve million accounts—one in four Britons—with £283 million (£14,739 million today) on deposit.
The British system first offered only savings accounts. In 1880, it also became a retail outlet for government bonds, and in 1916 introduced war savings certificates, renamed National Savings Certificates in 1920. In 1956, it launched a lottery bond, the Premium Bond, which became its most popular savings certificate. Post Office Savings Bank became National Savings Bank in 1969, later renamed National Savings and Investments (NS&I), an agency of HM Treasury. While continuing to offer National Savings services, the (then) General Post Office, created the National Giro in 1968 (privatised as Girobank and acquired by Alliance & Leicester in 1989) and more recently, Post Office Ltd. offers savings accounts based on its brand, operated by the Bank of Ireland, a commercial bank and Family Investments, a friendly society.
The Post Office branded services are similar to some of NS&I's services, and include instant savings, Individual Savings Accounts, seasonal savings and savings bonds. Post Office Ltd also provides a Post Office card account that accepts only direct deposits of certain state pension and welfare payments, permitting cash withdrawals over the counter. This last account is offered in partnership with the Department for Work and Pensions, until 2010 through investment banking and asset management company JP Morgan. (This contract has recently been awarded to JP Morgan to run till 2015)
Many other countries adopted such systems. Many were later abolished or privatized, though some countries offer postal savings and banking through partnerships with commercial banks.
Currently operational systems (including privatized systems)
- LienVietPostBank: Lien Viet Post Joint Stock Commercial Bank or LienVietPostBank(LPB), formerly known as LienVietBank, is a Vietnamese retail bank that provides banking products and services through its own transaction points across 42 cities and provinces and 1,031 postal transaction offices nationwide. LienVietPostBank is considered to be in the top 10 biggest banks in terms of assets and equity  and ranked 36th in VNR500 -Top 500 largest private companies in VietNam in 2013. The Bank is striving to become the bank for everyone in VietNam by focusing on banking products for households and small and medium enterprises especially in the agriculture sector, and expanding its activities to rural and remote areas via the post.
- Japan Post Bank: In Japan, the post office was the world's largest savings bank with 198 trillion yen (US$1.7 trillion) of deposits as of 2006, much from conservative, risk-averse citizens. The government was criticized for using these funds to engage in uneconomical infrastructure projects—what in America would be called pork barrel spending. The state-owned Japan Post Bank business unit of Japan Post was formed in 2007, as part of a ten year privatization programme, intended to achieve fully private ownership of the postal system by 2017.
- Deutsche Postbank: Germany has, like Japan, a postal banking system: Deutsche Postbank was a subsidiary of Deutsche Post until 2008, when 30% of Deutsche Post's shares were sold to Deutsche Bank. Postal banking services are still available at all branches of Deutsche Post and Deutsche Postbank.
- In the People's Republic of China, the Postal Savings Bank of China (zh:中国邮政储蓄银行) was split from China Post in 2007 and established as a state-owned limited company. It continues to provide banking services at post offices.
- Brazil instituted a postal banking system in 2002, where the national postal service (ECT) formed a partnership with the largest private bank in the country (Bradesco) to provide financial services at post offices. The current partnership is with Bank of Brazil.
- Israel's postal service offers utility payment, savings and checking accounts, as well as foreign currency exchange services from all post offices.
- France's La Poste, similar to the UK's Post Office, offer banking services called "La banque Postale".
- Korea Post, operated by South Korean government, has its postal banking and postal insurance business. Korea Post also handles deposit and withdrawal to/from Citibank Korea, IBK and KEB account. Postal banking and insurance counter is available in all post offices, excluding postal agency and mail delivery centers.
- India post, operated by Government of India, under Indian Postal services providing small savings banking and financial services, including National Savings Certificates.
- South African Postbank, operated by the South African Post Office (SAPO). Offers transactional, savings, investments, insurance & pension banking services.
- Kenya Post Office Savings Bank (KPOSB/Postbank) 
- In Sri Lanka, National Savings Bank and Sri Lanka Post provide banking services through post offices.
- In the United States, the United States Postal Savings System was established in 1911 under the Act of June 25, 1910 (36 Stat. 814). It was discontinued by the Act of March 28, 1966 (80 Stat. 92).
- In Canada, Canada Post had a postal bank but it was shut down in 1968.
- In Austria, the Österreichische Post used to own the Österreichische Postsparkasse (P.S.K.). This financial institute was bought and merged by the BAWAG in 2005.
- In Bulgaria, the postal banking system was a subsidiary of Bulgarian Posts until 1991, when Bulgarian Postbank was created. In the years that followed, Bulgarian Postbank was privatized and the relationship between post offices and bank offices became weaker. Postal banking services ceased to be available in post offices in 2011.
- In Ireland, An Post ran the Postbank between 2006 and its closure in 2010, that was a joint venture with and BNP Paribas.
- In Portugal, the CTT owned 49% of the Banco Postal, with Caixa Geral de Depósitos (the independently state-owned bank) owning the remaining 51%. This partnership did not go well, and eventually Caixa Geral de Depósitos bought and absorbed the bank.
- In Finland, Postisäästöpankki ("Post Savings Bank") was founded in 1887. In 1970 its name was shortened to Postipankki ("Post Bank"). In 1998 it was changed to a commercial bank named Leonia Bank. Later, it was merged with an insurance company to form Sampo Group, and the bank was renamed Sampo Bank. It had a few own offices, but also post offices performed its banking operations until 2000. In 2007, Sampo Bank was sold to the Danish Danske Bank.
- POSB of Singapore, stands for Post Office Savings Bank. Now part of DBS Bank (Development Bank of Singapore).
- Postbank – Ireland
- Deutsche Postbank AG – Germany
- Greek Postal Savings Bank (Taxydromiko Tamieutirio)
- Postal Savings Bank notes (1919) – Hungary
- Postbank N.V. – Netherlands
- Philippine Postal Savings Bank
- PostBank – New Zealand
- Postbanken – Norway
- POSBank – Singapore
- United States Postal Savings System - United States
- "Business history records: Post Office Savings Bank". British Postal Museum & Archive.
- "Growth Bonds". Post Office Ltd. Retrieved 2008-10-22.
- "Christmas Club". Post Office Ltd. Retrieved 2008-10-22.
- "Post Office ISA". Post Office Ltd. Retrieved 2008-10-22.
- "Instant Saver". Post Office Ltd. Retrieved 2008-10-22.
- "Post Office card account". Post Office Ltd. Retrieved 2008-10-22.
- "Japan Bank Lobby's New Chief Wants Brokerage Barriers Lifted". Bloomberg.com. 2007-04-24.
- Griemel, Hans (2007-03-31). "Privatization of Japan's postal colossus sparks competition fears". Taipei Times (Tokyo). Associated Press. p. 9.
- Seib, Christine (13 September 2008). "Deutsche Bank makes £2.2bn U-turn to buy stake in Postbank". The Times. Retrieved 2008-09-14.
- Cox, Ethan (2013-12-16). "How to save Canada Post." National Post
- "Postbank to 'Wind Down' by End of Year". RTÉ News. 26 February 2010. Retrieved 2014-12-09.