The current regime allows that the minister, who has reasonable grounds to believe that somebody has for instance committed fraud or misrepresentation in applying for citizenship, will inform the citizen they may face a revocation of their citizenship as a result. The citizen is only allowed to make written submissions. It's up to the minister's discretion whether to hold a hearing.
Upon receipt of the written submissions the minister decides whether or not to revoke the citizenship. The citizen, now a foreign national in Canada, has only the right to request leave of the Federal Court to have a judicial review of that decision. There can be no new evidence submitted at the Federal Court.
In that way, loss of citizenship for misrepresentation or fraud attracts fewer procedural fairness guarantees than, for instance, loss of permanent residence for misrepresentation where a permanent resident would have access to the appeal tribunal.