> For the complete documentation index, see [llms.txt](https://docs.zotlo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zotlo.com/integrating-zotlo/sandbox-mode.md).

# Sandbox Mode

### Test Payment Cards

In sandbox mode, purchases can be made with the following test cards. Expire date and CVV are optional, but the expire date must not be older than the current date.

 These cards are only valid for credit card payment method. When other payment methods are selected, it is not expected to enter any card information, it is treated as a direct successful payment.

| Card                | Scenario                                               |
| ------------------- | ------------------------------------------------------ |
| 4111 1111 1111 1111 | Purchase successful                                    |
| 4111 1111 1111 1129 | Insufficient card limit.                               |
| 4128 1111 1111 1112 | The transaction was not approved by the bank.          |
| 4125 1111 1111 1115 | The card has expired.                                  |
| 4000 0600 0000 0006 | CVV is incorrect.                                      |
| 4000 1600 0000 0004 | 3DS validation error.                                  |
| 4120 1111 1111 1110 | The transaction was not approved for security reasons. |