Is it okay to resign and send a text message?

Generally, if you resign, you need to inform the employer one month in advance, so the real departure time should be next month, so don't put parentheses, because you must go through the resignation procedures and don't need the consent of the leader to leave, so it is redundant.

Extended data:

Labor law is the general name of legal norms regulating labor relations and other social relations closely related to labor relations. Different countries have different forms of labor laws, but most of them include the following basic contents: labor employment law, labor contract law, working hours and rest time system, labor remuneration, and labor safety and health regulations.

Special protection system for female workers and underage workers, labor discipline and reward and punishment system, social insurance and labor insurance system, employee training system, democratic management system for trade unions and employees, labor dispute handling procedures and supervision and inspection system for the implementation of labor law. Labor law belongs to the category of civil law at the earliest.

Article 31. A laborer who terminates a labor contract shall notify the employer in writing 30 days in advance.

Baidu encyclopedia-labor law