You need to be competent to carry out PAT Testing, and after completing our course you will be (see above.) There is no law which says that you have to retrain after 3 years etc. We would normally suggest that as long as you carry out PAT Testing on a regular basis then the certificate does not 'run out' but you may want to think about doing the course again after 3 - 5 years just as a refresher or update.