Posts

Showing posts with the label credit card payment

Featured post

How to decode Tag-Length-Value Quickly

Basically, in TLV, the format is Tag, Length, and Value. In the list of protocols, TLV is one of the types. Transmitting the data depends on the protocol you used. However, many financial transactions still follow the TLV format. According to IBM, TLV data is three parts. The tag tells what type of data it is. The length field has a length of the value. The Value field has actual value.

Structure of TLV.TLV comprises three field values.  TagLengthValueEMV formulated different tags. They have their own meanings. Usually, the Tag and Length together takes 1 to 4 bytes.
The Best example for TLV.In the below example, you can find the sample TAG, LENGTH, and VALUE fields.

[Tag][Value Length][Value] (ex. "9F4005F000F0A001")
where

Tag Name = 9F40

Value Length (in bytes) = 05 
Value (Hex representation of bytes. Example, "F0" – 1-byte) = F000F0A001

In the above message, tag 9F40 has some meaning designed by EMV company. Here you can find a list of EMV Tags.
How to read the TLVTag: 1…

Credit Cards Domain: How Voice Transaction Works

Image
Voice transaction is a method to pay the bills for a merchant at POS. The scenario is when you visit a Retailer where you purchased for Rs1000. You forgot to carry a card with you but you remember card details.
Then you can ask the merchant to use Voice authentication for completing the payment.


Credit Cards Domain: How Voice Transaction Works 👉 How to Initiate Voice Authentication.After you start the call, the first step is you need to enter the merchant id. Usually, your Call goes to Card Issuer.Then you need to select an option like you are doing a transaction for the Credit card.You need to enter your card number and expiry date.Select the option for Card present or Card not present.Enter the amount you need to pay.Then Card issuer's call center provides you a 6 digit approval code. You need to tell the approval code to the merchant, and the merchant also will get a message. Then the merchant completes the transaction using the Voice approval code.
Notes:Sometimes Merchant Servi…