kratos6753-subscription

[paper wolf]

If you use Setup Intents to save the card for future usage then that's the best way to hopefully not need authentication for future payments, but banks/issuers can always choose to ignore the previous authentication and ask for it again

So yes, it's always a possibly that authorization may be needed on future subscription charges

[blazing python]

does changing invoice amounts in a billing cycle trigger authorization? - can this be a factor?

[paper wolf]

Just changing the invoice amounts is a possible factor, but that isn't the way to think about it - really it's entirely up to the banks/card issuers to decide if authorization is needed or not. Using setup intents is how we request an exemption to not need future authorization, but they can always decide to reject that exemption if they want to

You may want to look into enabling the "Send a Stripe-hosted link for customers to confirm their payments when required" dashboard setting (found at https://dashboard.stripe.com/settings/billing/automatic) so that when authentication is needed for a recurring charge we'll send an email to your user to complete payment