All licensed installers are experienced experts who, as a normal part of the licensing process, have been vetted by the Gardaí and are subject to ongoing regulation by the PSA. Licensed installers have demonstrated their competence in achieving compliance with the applicable European standard setting out how the intruder alarm system is installed Unlicensed installers are committing a criminal offence and the PSA has convicted several installers and companies. Where the services of an unlicensed installer are engaged both the unlicensed installer and the client are liable for criminal prosecution with penalties of fines and/or imprisonment. http://www.psa.gov.ie/en/PSA/Pages/offences