I'm overstay for 90 days I find already work but...

We would like to inform you that according to the UAE Labor Law, if you have fines due to the overstay then you can’t be pardoned or install it, but you can try to go to the Immigration and Residence and apply grievance letter to discount, and they may accept or refuse that.
For the overstay fines, the below articles state:
Article 77
The Executive Regulation of Federal Law, stipulating that the competent Naturalization and Residency Department shall collect a fine of 100 AED for each day in which the alien resides illegally. As the penalty shall be calculated from the day following the expiration of the non-renewable visa and the expiration of 10 days for the renewable visas and seven days from the date of issuance of the exit permit for violators of the Aliens Entry and Residence Law.
Note that, the Nationality and Residency consider the 100 AED fine from the first day of expiration of all visa types even visit, transit, entry, tourist and entry permit to visit residents in the GCC.
Article 78
Of the same law stipulates that, except in the cases mentioned in the preceding article, the financial fine obtained by an alien for his illegal residence in the country after the expiration of his/her visa/residence permit, as it shall be calculated as the following:
· (25 AED) on every day of the first six months,
· (50 AED) for each of the next six months.
· (100 AED) for each day next to the year