# With USDN

You have the option to buy Certification Credits with fiat using USDN.

Certification Credits will allow you to use all the Certification features without the need to hold any token/crypto in your account, instead, a number of credit will be associated to your account and deducted after each Certification.

The credits associated to your account are displayed at the top of the webapp:

![](/files/-M8-tMfMHj_zBn3PBifU)

To buy credit with USDN, you need to click on the **"USDN > SIGN"** button on the left sidebar:

![](/files/-M8-vJmZYvQgqutvM_ZW)

This will open a popin with the USND > SIGN convert form.

USDN is a stablecoin and is therefore always valued at the price of 1$, SIGN Certifications are priced at 0.5$, so the conversion is really easy. You can convert any USDN to SIGN Credit by entering the amount of USDN to convert, this amount needs to be a multiple of 0.5:

![](/files/-M8-vlAwLr7tUXLaiG6T)

Click confirm and the Waves Signer popin will open with the transaction details, verify that everything is correct and click **"Confirm":**

![](/files/-M8-w8GEKpSq4RtrLzYn)

Once the transaction is confirmed, you will receive a confirmation message and your account credits will be credited:

![](/files/-M8-x0_7WhSNLvovYGCh)


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