If you are accused of cheating
Most online chess platforms use anti-cheating software. If you cheat, you may be disqualified from the platform for a month or longer. The platform anti-cheating measures are described here: chess.com lichess.org
If you are accused of cheating, a sub-committee consisting of the Chairman and/or Junior Co-ordinator; the Tournament Organiser and/or the Captain; and if an extra person is needed to form a quorum of three, a co-opted strong member of the club, will decide whether the allegation is justified, and if so, what sanction should be imposed. This might be exclusion from online matches for a period or permanently; and in the case of a repeat offence, expulsion from the club.