Dear Matxavier,
Though technically you are correct, you are taking a somewhat simplistic view of your employment.
Statutory Obligation of Appointment
Yes, the issue of the appointment is a statutory obligation. Nevertheless, even though this obligation was not fulfilled, you continued with the employment because you needed the job. It appears that now you have a better opportunity. So, when you wish to separate, you had an epiphany of not having been issued with the appointment letter.
Why Didn't You Ask for the Appointment Letter?
All along, why did you not ask for the appointment letter? What was the hold-up?
Service-cum-Employment Certificate Concerns
In his email to you, your employer did not write anything about the issue of the "Service-cum-Employment Certificate" as well. In case you stop reporting for the duties and if the employer does not issue the employment certificate, then it could nullify your tenure in this company. Are you prepared for this eventuality?
Potential Consequences of Abandoning Employment
If you abandon the employment and as a retaliatory measure, what if the employer keeps you on the rolls of his company, then your UAN of PF will remain as it is. In that case, will it not create a problem in future employment?
Please realize that you are working in India. Employers always have the upper hand here. Therefore, discretion demands not to demonstrate impudent boldness.
Advice for Separation
You may talk to your employer. Understand his thought process. There is nothing wrong if you agree to serve a notice period of up to 15 days. Later, submit a letter of resignation. Complete the notice period and have a separation on a positive note. If you separate on a bitter note, your employer has nothing to lose, but it could jeopardize your career!
Thanks,
Dinesh Divekar