My landlord has submitted my cheque in the bank...

If your inquiry is related to the homeowner's taking legal measures by check despite paying all obligations, here is the following information:
You should have returned the bank check that you granted to the homeowner as a guarantee when paying all the required obligations, as submitting the security check to the court means the difficulty of your legal position and you must pay the value of the check or bring witnesses that this check was given to the homeowner by way of security and the judge of discretionary authority to accept this reason or reject it and issue a ruling against you
Here is the text of the Qatari Penal Code related to your inquiry:
Article 357:
Whoever maliciously commits the following acts:
1. Writing a check, without sufficient funds to cover it face value.
2. Withdrawing all or some of the funds from an account after giving a check in a way that leaves insufficient funds to cover the amount of the check.
3. Ordering the recipient of the check not to exchange or deposit it
4. Intending to write or sign the check in a way that prevents its exchange.
5. Delivering a due cheque knowing that it is uncovered or not exchangeable.
In any event, the court shall decide upon the request of the concerned, to oblige the offender to pay the value of the cheque and the expenses incurred by the beneficiary;
The procedures in the Code of Commercial and Civil Procedure shall determine the execution of this judgment. If the court finds that this decision requires a special investigation necessitating a delay in the judgment, it has the right to pronounce a judgment in the lawsuit only and to defer the examination of the mentioned request to another session or refer it to the civil court.