# License Invalidation Tool

If you deploy hardware identification locks, you can use the License Invalidation Tool to enforce invalidation of a license on one machine to allow your licensee to move the installation to another machine.

To enforce invalidation, load your .NET Reactor project, open the License Invalidation Tool, and click "Create Invalidation Tool." This creates an executable that your client runs on the invalidation machine to produce a confirmation key. Return of a valid key confirms you can issue a new license.