Validate/Authorise cvv number from Stripe without charge in iOS

Question

Anyone please confirm how to validate/authorise cvv number of your credit/debit card from Stripe without charging the card? I am using Stripe to create card token but that did not validate cvv. I am building a custom UI to add my payment details but I need to validate whether card details (cvv number) are correct or not without charging it. Below is the function I am using but that did not worked.

func isValidCard(cardNumber: String?, month: UInt, year: UInt, cvv: String?) -> Bool {
    
        let params = STPCardParams()
        params.number = cardNumber
        params.expMonth = month
        params.expYear = year
        params.cvc = cvv
        if STPCardValidator.validationState(forCard: params) == .valid {
            return true
        } else {
            return false
        }
    }  

Any help will be appreciated. Thanks

Answer 1

If you only want to check that the CVV length match the card brand, you could simply use validationState(forCVC:cardBrand:) .

To check that the CVV is valid without actually charging the user, then you need to save the customer's card with a SetupIntent. You can do so in two main ways:

• Use the Payment Sheet as explained in this detailed guide
• Or create a SetupIntent on your backend and then confirm it on the frontend with STPSetupIntentConfirmParams while passing the card details

Note that Stripe cannot guarantee that the CVV check will be available as explained here .