May you please clarify the ruling on transactions involving visa credit cards whereby the cardholder has to pay back the money he spends using this card within a certain period of time. If payment is made after the prescribed period then the bank will charge interest on late payment. Does this usurious clause invalidates the contract in its entirety or it spoils it in such a way that the contract remains valid, meaning to say if payment is made before the lapsing of the monthly period then it will be a valid loan which is not prohibit
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