I've noticed a lot of requests for Postal Code validation. I don't know if anyone posted one, but here is an addon method I wrote for Canadian postal codes.
$.validator.addMethod("postalCode", function(value) { // Addon method for validating postal codes. Valid formats are (X1X 1X1) or (X1X1X1) or (X1X-1X1). return value.match(/^[a-zA-Z][0-9][a-zA-Z](-| )?[0-9][a-zA-Z] [0-9]$/); }, 'Please enter a valid postal code'); You can then use the rule postalCode:true to validate.