Transaction approval code

Hello. How can i get “transaction approval code” ? This is required by the seller.

Most of the time this is numbers/code in the description of the seller transaction ( a first transaction of 1€/GBP/USD reverted after a few days ) that you can found in your :r: account.

What is the seller ?

Same issue guys. Dont know where to find the transaction approval code …pls assist anyone …