My next 90 Days Reporting is dated 10 December 2021.

I may be leaving the country on 9th December 2021.

If I do so, I won't have to do the reporting ?

Is this correct ?

Your kind advice is much appreciated.

Thanking you all in advance. Thank you.

You will not need to a 90 day report before you leave. As soon as you leave the country your 90 day report count ends. 

You start a new 90 days when you enter the country.

Immigration at airports do not check for 90 day reports.

Thank you, Ubonjoe.

Much appreciated. Thank you.