#samiya_webhooks
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- samiya_api, 5 days ago, 75 messages
dense mesa
Hi there, there's no built-in mechanism to limit 1 subscription per credit card. You can consider writing your own radar rule to block certain transactions basd on card usage https://docs.stripe.com/radar/rules/supported-attributes?payment-method=card#card-usage
inner moth
Can we write a radar rule to block duplicate transactions from a card even if the card is in trialing subscrption yet
dense mesa
Can you share more context? there's no transaction if the subscription is still trialing.
inner moth
I have 3 domains, and on each domain I have a landing page where I am using Stripe subscription (7-day trial using setup intent to store the card) and then recurring transactions after that. What I want is that, e.g someone subscribes for a subscription on one domain using a card, then if the user tries to submit another form using the same card either on the same domain or another domain, it should throw an error
dense mesa
Are you using the same Stripe account for all these 3 domains?
dense mesa
Ok. So basically you want to block a transaction if the same credit card has been used in another subscription, am I right?
inner moth
yes
dense mesa
https://docs.stripe.com/radar/rules/supported-attributes?payment-method=card#card-time
If you want to allow the first transaction but block subsequent ones, you could use this rule to only block transactions after a certain time period has passed since the card was first used:
Block if :seconds_since_card_first_seen: > 0
However, it may not work for trial subscription since no payment is involved. You'll want to test it out.
inner moth
But this will block the the recurring payments as well I guess?
I just want to not have duplicate subscriptions with one card
dense mesa
You can combine the rule with the is_recurring attribute. For example
Block if :seconds_since_card_first_seen: > 0 AND NOT :is_recurring: to avoid blocking recurring payments.
inner moth
So this will block duplicate transactions from a card but not the first recurring payment?
dense mesa
Yes you are right. To be clear, the first payment that your customer completed in checkout isn't considered as "recurring payment".
inner moth
When I submit a form with a card for the first time its subscription will works correctly but if I use the same card again, it will block the form submission?
dense mesa
Have you tried? What's the subscription ID?
inner moth
No I didnt try it yet. I was just confirming before trying
dense mesa
I'd suggest you to test it out in sandbox environment and let me know if you encounter problelms