The Data Protection Commissioner will appear before the Public Accounts Committee next month to discuss the Public Services Card.
The commission says the card's in breach of data protection laws.
It says there's no legal basis for any state agency - other than the Department of Social Protection - to insist someone has the card.
The commission has given the state 21 days to stop breaching data protection rules.
It comes after the body completed its initial investigation into the way the Government has been using the card - and warned that it is in breach of several aspects of data protection law.
The watchdog is demanding immediate action to fix the problem.
Various state agencies use the Public Services Card (PSC).
It's most commonly used by people to access social welfare payments, but is also required for services form other departments such as first-time passport and driving licence applications.
In the report released yesterday, the watchdog said it has no issue with the Department of Social Protection (DEASP) processing personal data on the card so that it can be used to claim social welfare.
However, it said it objects strongly to the information being processed by other state agencies - a situation which the commission says is in breach of data protection laws.
It means most state bodies will no longer be able to insist a person has the card to access public services.
