If you are migrating to an online system of storing or accepting employee details, then you can place this resignation form on your website or you can share this link to the employee who is going to leave.
Allow your employee to fill this online resignation letter instead of manual one.
You can accept all necessary details of an employee like his name, department, post date of joining etc.
This filled entries can be viewed and managed by you on FormGet dashboard.
A sample free form template is shown above which you can refer and create one for yourself.