What is "kod bezpieczenstwa" or security code ?

In the past, it was called "kod potwierdzający". It is used to secure the integrity of transferred transaction data (parameter's values) between Tpay.com and the merchant's systems. Can be up to 32 characters long. It is required to implement Tpay.com on the merchant's website. It is automatically generated after registering on Tpay.com and is available in POP (Merchant Panel). Please do not confuse it with the password to Merchant Panel (they are 2 different things).