> For the complete documentation index, see [llms.txt](https://ai-docs.fptcloud.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ai-docs.fptcloud.com/account/billing/tutorials/redeem-voucher.md).
# Redeem voucher
### Billing Information
Before you can redeem vouchers, you must provide your **Billing Information** for invoicing and tax purposes.
1. From the left-side menu, go to **Account → Billing**, **or** on the **FPT AI Factory Homepage**, click **Add Credit.**
2. If your billing information is not yet provided, a pop-up will appear asking you to complete it.
### Add a voucher
After you have received a voucher code, follow the instructions below:
1. In the left-side menu, click **Billing** under the **Account** section
2. In the **Add Voucher** area, enter your voucher code and click **Apply Code**. (*Note: Voucher codes consist of 10 characters, including uppercase letters and numbers.)*
{% hint style="info" %}
* The voucher must be **redeemed within a validity period**. Expired codes cannot be used.
* **Voucher credits also expire after** **a validity period** and **cannot be used once expired.**
* **If you have both top-up and voucher credits,** the system will deduct voucher credits first when using AI Factory services.
{% endhint %}
3. Once applied successfully, a confirmation message will appear: "**Your voucher has been applied successfully.**"
4. The applied voucher will appear under the [**Voucher List**](https://ai-docs.fptcloud.com/~/revisions/ZpDYwJ0NVmFzRmmg2MUh/account/billing/tutorials/how-to-manage-voucher-list) **tab** for your reference.
---
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