When the invitations are sent out, the health status of the individuals, or whether they have had a previous colonoscopy, is not known. That is why you receive the test. If you want to take the test, you can, but in your case, it is not very useful. However, it is always helpful to inform the Coordination Center's doctor that a colonoscopy has been done by returning the invitation letter or the identification form with this information. This way, new tests will no longer be sent unnecessarily. The information provided to the Coordination Center remains confidential and protected.