> ## Documentation Index
> Fetch the complete documentation index at: https://help.2chip.app/llms.txt
> Use this file to discover all available pages before exploring further.

# How promo codes work

> How to apply a 2Chip promo code and what happens after a failed payment or refund.

Apply a promo code **before payment**. The discount and final amount should be visible before you confirm the charge.

## General rules

* a promo code is valid for **6 months**;
* the maximum discount is **\$3**;
* only **one** promo code can be used per order;
* promo codes do not stack with other promo codes, promotions, or discounts;
* if several codes are available, you choose one;
* a code can be public or personal.

> [!NOTE]
>
> The percentage depends on the specific promo code. Always rely on the code conditions and the final amount shown before payment.

## If payment fails

The promo code is **not burned**.

If payment is finally declined, the code can be used again. If the payment result is still unknown, the code stays associated with the current attempt until the final result arrives.

## If the order is refunded

After a successful refund, the promo code used for that order is restored.

Its new validity period is **6 months from the successful refund**.

## If a promo code does not apply

Check:

* the code was entered correctly;
* it has not expired;
* it applies to your account and order;
* no other promo code or discount is already selected.

If everything looks correct but the discount still does not appear, contact support **before paying**.

> [card] [How Invite a Friend works](https://help.2chip.app/en/referrals/referral-program.md)
>
> Your friend gets a first-order discount, and you can earn a personal promo code after the referral conditions are met.


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