At the beginning of this year 2021, I also paid $1200 credit card bill, in cash (currency), for my son, by personally going into the bank that issued the credit card to my son. The bank took the currency and my driver’s license. Bank gave me a receipt for that payment and returned back the driver’s license. Will this payment/transaction shows up anywhere in my IRS documents or in my son’s IRS documents? Unless that bank reports this cash payment matter to IRS, is there any way the IRS knows about this cash payment? Finally, the bank uses my driver's license details for what purpose?