If a company experiences a data breach involving your personal information, Qatar's Personal Data Privacy Protection Law places a direct obligation on them to notify you. Under Article 14, the Controller must inform both the affected individual and the Competent Department (the Ministry of Transport and Communications) if a breach of security measures occurs — particularly if the breach could cause serious damage to the individual.
This means you should not have to discover a breach on your own. Companies are legally required to proactively alert you so you can take protective steps, such as changing passwords, monitoring your bank accounts, or being vigilant about identity theft attempts.
If you suspect a company has experienced a breach affecting your data but has not informed you, you can contact the company directly or file a complaint with the Ministry of Transport and Communications. It is also wise to keep records of any suspicious account activity or communications that may have resulted from the breach, as these could support any formal complaint you raise.
This is general legal information, not legal advice. For advice on your specific situation, consult a lawyer licensed in Qatar.