DE 48—ADDITIONAL DATA: İşlemlere özel kullanılabilen ek bilgi alanlarıdır. 255 karakter uzunluğundadır.
F48 alanında bir çok bilgi gönderilmektedir. F48 PDS’lere bölünerek kullanılmaktadır.
| Position | Value |
| 1-4 | Reserved – (Filler) |
| 5-255 | Private Data Subelements |
| Value | Description |
| PDS Length | 2 digits that indicate the number of bytes in PDS |
| PDS Tag | 2 digits that uniquely identify the PDS |
| PDS Value | Actual data for that PDS |
PDS 37:Additional Merchant Data
PDS 42 – Security Level Indicator
| PDS Value | Description |
| 21x | Channel encryption (Visa 3D-Secure, MasterCard SecureCode) |
| 81x | Channel Encyption (BKM Express) |
| 82x | Channel Encryption (GO) |
| 91x | No security protocol; cardholder certificate not used |
| X | Description |
| 0 | UCAF/CAVV/EXPSIGN not supported by merchant |
| 1 | UCAF/CAVV supported by merchant but not provided by issuer |
| 2 | UCAF/CAVV/EXPSIGN is present |
| 3 | UCAF (MasterCard assigned Static Accountholder Authentication Value, which is used for MasterCard Advanced Registration Program) is present |
PDS 43 – UCAF/CAVV/ExpSign Data
PDS 74 – Transaction Id (Visa P.126.8)
PDS 84 – Recurring Payment Indicator
PDS 87 – Magnetic Stripe / CVV Invalid
