I used to work in dubai till 2015 and took...

We would like to inform you that you will be banned from travel until you pay the loan amount and your visit visa will not be renewed

If you have previously signed a check, a case will be filed against you for issuing a check without balance and the penalty for that is imprisonment and a fine

According to the UAE Penal Code, below article states:

Article 401

Detention or a fine shall be imposed upon anyone who, in bad faith, gives a draft (cheque) without a sufficient and drawable balance or who, after giving a cheque, withdraws all or part of the balance, making the balance insufficient for settlement of the cheque, or if he orders a drawee not to cash a cheque or makes or signs the cheque in a manner that prevents it from being cashed. The same penalty shall apply to any one who endorses a cheque in favor of another or gives him a bearer draft, knowing that there is no sufficient balance to honor the cheque or that it is not drawable.

The criminal case shall be dropped if the payment or waiver is made after the occurrence of the crime and before the dismissal by a final judgment, and if this happens after the process of judgment is ceased, the judgments shall not be executed.

If the court orders that the check book be withdrawn from the convicted person and not giving him new books, so article (643) of the Commercial Transactions Law, the Public Prosecution shall inform the Central Bank of this matter to all banks. In the case of any bank violating the said order, then they will be forced to pay a fine of 100,000 AED.