# License Key

*Applies to: On-premises Publisher*

### Catalog Information - License Key

When the publisher first launches, you will be required to provide a license key. If you have not yet purchased and received your license key, we provide two additional **free options for testing our product**.

The first option is to enable the [**Limited Trial Mode**.](https://patchmypc.com/frequently-asked-questions#trial-catalog) This limited trial mode does have some restrictions including a limited number of products as covered in the link above. We encourage you to [**request a free thirty-day trial**](https://patchmypc.com/free-trial) from our website. When you receive your full-trial or customer license email, it will contain your 20 character license key.

![Example license key email](https://3773699522-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MX7dvS0r_4fc0AikgJS%2F-MYrPQC7rxjfa9YOB5wJ%2F-MYrR0hkeuNDph4R1eWF%2Fimage.png?alt=media\&token=c2d7828c-f36b-4696-b37c-758471c97373)

![Enter your license information](https://3773699522-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MX7dvS0r_4fc0AikgJS%2F-MYqYC-3ospsvVJSKscF%2F-MYqYJTLvG5K1ZeEeXqE%2Fimage.png?alt=media\&token=cf2085b8-09b0-4ac8-80a2-27b8cf763387)

{% hint style="success" %}
The [**full-access 30-day trial**](https://patchmypc.com/free-trial) contains all features and access to all products.
{% endhint %}

If the license validation is successful, it should look like the below image.

![Licensed product information validation.](https://3773699522-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MX7dvS0r_4fc0AikgJS%2F-MYqYC-3ospsvVJSKscF%2F-MYqYS4_g5YyjghQEcxk%2Fimage.png?alt=media\&token=329d781c-e9c4-4403-8ddd-f0ce0963e792)

{% hint style="warning" %}
If you receive an error when clicking Validate URL, please review our knowledge base article [Troubleshooting License Activation Issues](https://patchmypc.com/troubleshooting-license-activation-issues). License activation errors are often related to firewall or proxy configurations.
{% endhint %}