I left the UAE without resigning from my job and sent an email from India regarding my resignation. The HR department asked me to send my passport for visa cancellation. I worked for 5 years and 6 months in that company. I am concerned about whether it is safe to send my passport for cancellation. Can they impose a GCC ban or UAE ban on me? Is there an option to send the passport to the UAE from India, such as through a courier service or the embassy? Please help me with this.