# Debit card number for Sandbox environment

**URL:** <https://developer.squareup.com/forums/t/debit-card-number-for-sandbox-environment/27969>\
**Category:** Questions\
**Tags:** sandbox\
**Created:** [September 24, 2026, 8:06am UTC](https://developer.squareup.com/forums/t/debit-card-number-for-sandbox-environment/27969 "2026-09-24T08:06:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![james2025](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@james2025](https://developer.squareup.com/forums/u/james2025)\
**Post date:** [September 24, 2026, 8:06am UTC](https://developer.squareup.com/forums/t/debit-card-number-for-sandbox-environment/27969/1 "2026-09-24T08:06:59Z")

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Hi,

Square’s documentation provides several test card numbers for use in the Sandbox environment, but they all appear to be credit cards.

Are there any Sandbox test card numbers that are recognized as **debit cards**?

We need to test some functionality specifically related to debit card transactions.

Thanks!

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**Author:** ![ashley-square](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@ashley-square](https://developer.squareup.com/forums/u/ashley-square)\
**Post date:** [September 25, 2026, 7:08pm UTC](https://developer.squareup.com/forums/t/debit-card-number-for-sandbox-environment/27969/3 "2026-09-25T19:08:01Z")

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We do not unfortunately. Could you share a bit more about the flows you are trying to test?

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<div class="post-metadata">

**Author:** ![james2025](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@james2025](https://developer.squareup.com/forums/u/james2025)\
**Post date:** [September 27, 2026, 12:56am UTC](https://developer.squareup.com/forums/t/debit-card-number-for-sandbox-environment/27969/4 "2026-09-27T00:56:58Z")

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We provide SaaS software for merchants. One of our merchants would like to charge a processing fee to customers who pay with a credit card, while waiving the fee for customers who pay with a debit card.

It looks like we’ll need to use real cards and test this in the production environment instead.

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<div class="post-metadata">

**Author:** ![ashley-square](https://avatars.discourse-cdn.com/v4/letter/a/5f9b8f/32.png) [@ashley-square](https://developer.squareup.com/forums/u/ashley-square)\
**Post date:** [October 7, 2026, 1:55pm UTC](https://developer.squareup.com/forums/t/debit-card-number-for-sandbox-environment/27969/5 "2026-10-07T13:55:09Z")

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That is correct. Best practice is to use small test amounts ($1) and refund immediately after your testing is complete.