# Sandbox card 4111 1111 1111 1111 does not work anymore

**URL:** <https://developer.squareup.com/forums/t/sandbox-card-4111-1111-1111-1111-does-not-work-anymore/23018>\
**Category:** Questions\
**Tags:** sandbox, subscriptions-api, cards-api\
**Created:** [June 29, 2025, 6:58am UTC](https://developer.squareup.com/forums/t/sandbox-card-4111-1111-1111-1111-does-not-work-anymore/23018 "2025-06-29T06:58:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nymkappamempoolspace](https://avatars.discourse-cdn.com/v4/letter/n/ac91a4/32.png) [@nymkappamempoolspace](https://developer.squareup.com/forums/u/nymkappamempoolspace)\
**Post date:** [June 29, 2025, 6:58am UTC](https://developer.squareup.com/forums/t/sandbox-card-4111-1111-1111-1111-does-not-work-anymore/23018/1 "2025-06-29T06:58:07Z")

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Good day,

I tried creating a new subscription `ed8cdc07-8c23-45b9-ac5b-097096d17fdc` using the sandbox card 4111 1111 1111 1111, the subscription immediately goes into `DEACTIVATED` state without issuing any invoice. I tried multiple times, always same result. This sandbox card is broken.

I’ve tested with mastercard 5105 1051 0510 5100 and it seems to be working fine.

Cheers.

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**Author:** ![josh-square](https://avatars.discourse-cdn.com/v4/letter/j/77aa72/32.png) [@josh-square](https://developer.squareup.com/forums/u/josh-square)\
**Post date:** [June 30, 2025, 6:03pm UTC](https://developer.squareup.com/forums/t/sandbox-card-4111-1111-1111-1111-does-not-work-anymore/23018/3 "2025-06-30T18:03:27Z")

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Hey @nymkappamempoolspace, I think this might be happening because of the `email_address` being set for the customer in our documentation code snippets. The `example.com` might be getting flagged as an invalid ID for the customer. I thought that had been changed in the code snippets, but I do still see some of them using that email. If you try this with a test customer with a valid email address, does it succeed?

I just tested myself using the `4111...` test card and was able to successfully create an `ACTIVE` subscription with an invoice issued.

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**Author:** ![nymkappamempoolspace](https://avatars.discourse-cdn.com/v4/letter/n/ac91a4/32.png) [@nymkappamempoolspace](https://developer.squareup.com/forums/u/nymkappamempoolspace)\
**Post date:** [July 2, 2025, 12:26pm UTC](https://developer.squareup.com/forums/t/sandbox-card-4111-1111-1111-1111-does-not-work-anymore/23018/4 "2025-07-02T12:26:40Z")

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Yes sound like using @example.com is not allowed.  
Using a valid email address does work even with 4111.

I’ll keep this in mind.  
Thank you