Employers need to be firm about this and not allow a new employee to start work before it is signed by both parties.
If they start before it was agreed to, the trial period would be invalid.
The allowance of seven days for a potential employee to review the contents of the agreement is best given and allowed for before they start work.
In your situation, the employee who has been employed by you is not eligible to be covered by a trial period.
In the case of the employee starting next week, I suggest that you prepare an employment agreement, include a trial period, and provide them with a reasonable amount of time to review the contents.
Make sure the agreement is signed by both parties before anyone starts work.
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