This Precedent Personal data breach plan can be used by Irish organisations to inform their staff and managers of the actions to take on discovering a personal data breach (including a cybersecurity breach). It reflects reporting requirements in the EU General Data Protection Regulation (EU GDPR) and takes into account relevant guidance from the Data Protection Commission (DPO). It incorporates a process for dealing with actual or suspected personal data breaches. A personal data breach plan may also be known as a data breach policy. This Precedent can also be used for cybersecurity breaches that involve the loss of, damage to or unauthorised access to personal data.