In the United Kingdom, postal orders can be bought in various denominations, then sent through the mail or post to the payee. Postal orders look like checks, can be made out to specific payees and can be restricted so that payees can only pay them into a bank account.
According to the U.K. Post Office, postal orders are a good choice for those who need to send money but have no bank account. They are also handy for paying for items bought on online auction sites, because the sender does not have to disclose personal financial information to use them. Postal orders are available in denominations ranging from 50 pence to ?250.