Hi
Please press F1 on the rule field. It says
Rule for the postal code field check
Indicator that determines how the Postal code field check is to be carried out.
Defined checks are triggered using Key 1 to 8. The numeric entry, the length of the entry, and any gaps in the entry are checked.
A special country-specific check is activated using Key 9. The entry is checked against a template defined in the system. Templates are currently defined for Canada, the Netherlands, Poland, Sweden, Slovakia, the Czech Republic, South Korea, and Portugal.
The following templates are implemented (A = letter, N = digit):
Canada: ANA NAN
The Netherlands: NNNN AA
Poland: NN-NNN
Sweden
Slovakia
The Czech Rep.: NNN NN
South Korea: NNN-NNN
Portugal: NNNN-NNN or NNNN
In the case of Portugal, the templates NNNN (old form) and NNNN-NNN (after the postal code reform) are used for the transition if check rule '9' is set.
USA: The system checks, independently of check rule '9', whether the postal code for an address in the USA satisfies the format NNNNN-NNNN or NNNNN.
Regards
Ramesh