A computer based banking system is provided in which at least selected clients termed participating system members have access to a remote device adapted to communicate with the computer base banking system such that financial transactions can be conducted by remote operation of the remote device by the participating system member to result in the debiting of a financial data base record associated with an instructing participating system member and in the crediting of a different financial data base record. Each data base record is identified by a conventional account number generated to conform to banking numbering standards as well as a linked communication number different from the relevant bank account number and composed of at least two component strings of numbers and/or letters, one of which is a number regionally unique to the participating system member, and the other of which is a bank identifying number unique to the particular bank at least on a regional basis. The communication number preferably also includes the two digit international dialing code; the telecommunications area code or the mobile operator code; and a check digit.
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