Support removed for Windows SDK

Please note that the Windows SDK is no longer supported. It will remain accessible, though please use it with caution. Find more information about our decision and a migration guide here.

License Verification (Windows)

When working with licensing we recommend that you periodically verify activated licenses with our platform, to confirm that they are still active and valid.

Check License Validity

Verify a license’s activation state as follows:

if (product.Activated)
    product.VerifyActivation((state, errorMessage) =>
        // Examine the verification state to determine the result of 
        //the verification attempt.

Verification Frequency

The frequency that you verify license activation state should take into consideration:

  • How often your users start or restart your app
  • How likely users are to be online or offline
  • The financial or technical impact of allowing users to continue to use an app in without a verified license

The properties LastVerifyDate and LastSuccessfulVerifiedDate of the Paddle Product object are updated each time a verification call is attempted, which can be useful for you to manage your verification regime.