This field is not designed to be used as a payment number and should be reserved for cheque numbers only as it effects the missing cheque report. This number is also designed to increase by 1 upon cheque creation.
For online payments the recommendation is to enter text such as EFT (or similar) and note the payment reference in the memo.
Memo exists in the bank reconciliation screen already, however it is not active by default. Click Columns to Display and then select Memo. You can now use memo in your reconciliation.
That is disappointing, as cheques No.s are being phased out by EFT payments, these no.s are required to be able to find the related no's when doing bank reconciliations/batching making it easier to match no.s & find them. Placing the no in Memo is not beneficial.