I was mobile loan,I am now illegal in kuwait. I...

It is expected that the creditor will open a case if you have signed a check guaranteeing the loan, in which case the court will order imprisonment and a fine or at least one of the two penalties.
Here is the text of the Kuwaiti Penal Law, related to your inquiry:
Article 237:
“A penalty of imprisonment for a period not exceeding three years and a fine not exceeding five hundred dinars, or one of these two punishments, shall be imposed on a person who, in bad faith, commits one of the following acts:
A - If he issues a check that has no return for an existing and disposable fulfillment.
B - If, after issuance of the check, the refund is paid in full or in part, so that the remainder does not fulfill its value.
C If the drawee orders him not to cash the check.
D - If he deliberately edits or signs the check in a manner that prevents it from being cashed.
E - If a check appears to another person or he delivers a check payable to the bearer knowing that he has no compensation that meets the full value or that it is not subject to exchange.

We recommend that you negotiate with the creditor in order to postpone the payment of the loan installment

It is expected that the creditor will open a case if you have signed a check guaranteeing the loan, in which case the court will order imprisonment and a fine or at least one of the two penalties.
Here is the text of the Kuwaiti Penal Law, related to your inquiry:
Article 237:
“A penalty of imprisonment for a period not exceeding three years and a fine not exceeding five hundred dinars, or one of these two punishments, shall be imposed on a person who, in bad faith, commits one of the following acts:
A - If he issues a check that has no return for an existing and disposable fulfillment.
B - If, after issuance of the check, the refund is paid in full or in part, so that the remainder does not fulfill its value.
C If the drawee orders him not to cash the check.
D - If he deliberately edits or signs the check in a manner that prevents it from being cashed.
E - If a check appears to another person or he delivers a check payable to the bearer knowing that he has no compensation that meets the full value or that it is not subject to exchange.