A forced resignation is when an employee has no real choice but to resign.
The onus is on the employee to prove that they did not resign voluntarily. The employee must prove that the employer forced their resignation.
The employer must take action with the intent to bring the relationship to an end or that has that probable result.
The line distinguishing conduct that leaves an employee no real choice but to resign, from an employee resigning at their own initiative is a narrow one. The line, however, must be 'closely drawn and rigorously observed'.