Hi Maria
Our software works exactly the same for instalments (Tech 1) and I have had this query before.
Section 562 (3)(b) if payment is made by quarterly instalments, the instalments are payable by 31 August, 30 November, 28 February and 31 May. Note that it says “by” not “on”.
The instalment payable “by” 30 November has already been paid prior to that “payable” date.
As stated in 562 (5) Council must send a “Reminder Notice” on or before 31 October, 31 January and 30 April. In my opinion the Act does not require a Reminder Notice to be sent for an instalment that has already been paid “by” 30 November as there is nothing to be “reminded”.
Hope this helps
Robert