One of the most serious problems a payment system can have is to 𝐝𝐨𝐮𝐛𝐥𝐞 𝐜𝐡𝐚𝐫𝐠𝐞 𝐚 𝐜𝐮𝐬𝐭𝐨𝐦𝐞𝐫. When we design the payment system, it is important to guara

One of the most serious problems a payment system can have is to 𝐝𝐨𝐮𝐛𝐥𝐞 𝐜𝐡𝐚𝐫𝐠𝐞 𝐚 𝐜𝐮𝐬𝐭𝐨𝐦𝐞𝐫. When we design the payment system, it is important to guara