In cases where an employee wishes to quit unexpectedly Must submit resignations to bosses, according to a hierarchy will be determined case by case, and when they are approved, and then quit.
If the employee wishes to resign suddenly. Must submit a letter to the superior hierarchical. It was approved on a case by case basis and approved, then resign.
In the case of the staff wanted to resign by suddenly. Must notice to their superiors, respectively. They receive approval as the case may be. And when approved resigned.