Probation confirmation letter for an employee who is soon going to resign

There is an employee whose probation period is about to get over in a week. He has already told us that he will be resigning in the first quarter next year. Should he still be getting his confirmation letter which is due next week?
My understanding is that he should. But, just want to confirm.

Follow the laid down protocol.
His resignation is a verbal information only and if he completes probation in between confirmation letter would be in order if things are fine otherwise about his overall suitability.
Notice period after confirmation would be different and resignation can be processed as per rules if and when and if he actually gives written notice of resignation.

The Employer issues the Confirmation Letter Only on Satisfactory Completion of the prescribed Probationary Period stated in the Appointment Letter and this/such Letter is issued on the Last Day of the Probation Period or the day following.
Tendering /Submitting Resignation Application/Letter on and after Confirmation Letter has been issued/put through is a situation, separate from the Resignation Application/Letter in course of and during the Ongoing Probation Period altogther. After Confirmation, Notice Period must be Given/Observed whereas Resignation during Probation is without Any Notice Period.
Be guided , accordingly.
Kritarth Team,
12.11.18

If the employee has met the expectations set by the employer within the probation period then confirmation letter can be issued else the probation period can be extended too!!! and his notice period is subjective based on the organization policy...