International Direct Deposit (IDD) data is retained on the MBR in the same fields
that are used to retain U.S. direct deposit information. However, the Social Security
Administration (SSA) creates a pseudo routing/transit number (RTN) for IDD by adding
a two-digit prefix to the foreign bank/branch number. For some countries, part or
all of the bank/branch number must be included in the Depositor Account Number (DAN).
For countries included in multi-country contracts, the two-digit prefix identifies
the processor bank, and the first character of the DAN is a letter that identifies
the country. The exception is Greece, which is under a multi-country contract but
has a separate two-digit prefix.
It is absolutely crucial to add this information:
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use the correct RTN prefix code;
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include the foreign bank information in the RTN and DAN fields; and
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include the country letter for any country included in a multi-country contract, when this is shown in the chart
at GN 02402.220B.2. in this section.