What is the ruling on working as a representative for purchasing cards (Visa) at Citibank, knowing that these cards are designated for high-income individuals, the customer does not pay to purchase the card initially, the maximum purchase limit reaches 9000 Egyptian Pounds, and it is settled within 50 days without interest, but if payment is delayed, interest is imposed when the amount is paid in installments over periods reaching 36 months?

It is not permissible to use credit cards that contain an interest-based condition or lead to falling into usury, even if the person intends to pay on time. Marketing these cards is forbidden because it constitutes cooperation in sin and aggression. The Messenger of Allah, peace and blessings be upon him, cursed the one who consumes usury, the one who pays it, its scribe, and its two witnesses. A Muslim should strive to seek lawful sustenance, for whoever gives up something for the sake of Allah, Allah will compensate him with something better, and whoever fears Allah, He will make a way out for him and provide for him from where he does not expect.