STANDARD_AVS_CODE_MAPPING = {
        'A' => 'A', # Street Address: Match -- First 5 Digits of ZIP: No Match
        'B' => 'I', # Address not provided for AVS check or street address match, postal code could not be verified
        'E' => 'E', # AVS Error
        'G' => 'G', # Non U.S. Card Issuing Bank