Salaam sir, I am working for a qatari employer as...

Dear Customer,                                
Thanks for joining and trusting us, much appreciated!

We would like to inform you that if you have terminated the employment contract in Qatar illegally, and the employer has filed a complaint against you and a decision has been made to terminate you from work, you will not be able to return to Qatar until at least four years. If the Qatari authorities issued a ban against you, it would be difficult to let you work in any other GCC country. 
We recommend that you negotiate with the employer to legally terminate the employment contract, as the unlimited contract can be terminated by informing the employer of your desire to terminate the employment contract at least thirty days before the termination.
Here is the text of the National Labor Law concerning your inquiry:
Article (49)
If the service contract is of an indefinite duration any of the two parties thereto may terminate it without giving the reasons for the termination. In this case the party intending to terminate the contract shall notify the other party in writing as follows:
1. In respect of the workers who receive their wages annually or monthly, the notification shall be given not less than one month prior to the date of the termination if the period of service is five years or less. If the period of service is more than five years, the notification period shall be at least two months prior to the date of termination.
2. In all other cases the notification shall be given in accordance with the following periods:
A) If the period of service is less than one year the notification period shall be at least one week.
B) If the period of service is more than one year and less than five years the notification period shall be at least two weeks.
C) If the service period is more than five years the notification period shall be at least one month. If the contract is terminated without observing these periods, the party terminating the contract shall be obligated to compensate the other party for an amount equivalent to the wage for the notice period or the remaining part thereof.

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