# What is a Registration Key

A **registration key** represents a **subscription** in your account. If you have ‘available registration keys’ in your account, that means you have paid subscriptions which have yet to be installed on a device.

You will be asked for a registration key during the installation of the filter. If you’ve just made the purchase of the subscription you are installing, you will have received an email with the key, however, the key can also be located in your account:

Once you have accessed your account at [Techloq.com](/content/site-root.html), click on the relevant subscription and then 'view subscription details'.

Your available registration keys will be displayed here.

It is important to ensure you have selected the **correct subscription plan** to ensure the **correct installation**. You can confirm that you have the correct key by checking the title of the page on which the key is located – if a different plan is noted, return to the main subscription plan tab in your account and ensure you select the correct subscription.

Trying to **reinstall** or **transfer** your filter? Your registration key may be tied up in the previous installation of your filter. Click [here](/content/help/KnowledgeArticles?id=kA08d000001lK6mCAE&category=Add_a_device/index.html) to find out how to proceed.

Please note: in a case where you make a purchase of a subscription to be applied to a device which _already has the filter installed_ with a different plan, e.g. you purchase a **filtering subscription** to apply to a device which is **currently on the Block-all plan**, you will still receive an email with the key and installation instructions however the change will actually **need to be processed by our team** in your account, rather than by installing the filter again. In such a case, as well as if you should have any other queries regarding your registration keys, don't hesitate to [get in touch with our dedicated customer service team](/content/help/KnowledgeArticles?id=kA0Tw0000000673KAA&category=Create_a_new_account/index.html) who will be glad to assist.