Finding duplicate entries

Apologies if stupid question or if raised and answered previously: Is there a quick way to check for duplicate entries in for Purchase Invoices (and payments), Sales Invoices, Payslip payments?

One thing you can do when looking at any screen listing is CLICK on any column heading and the screen will re-sort into ascending/descending order. So for Purchase Invoices, clicking on the Supplier column heading will sort all purchase invoices into alpha order - then you could check for duplicate amounts for the same supplier.

Or, from the Summary tab click on any Account and then click on the Debit or Credit column heading and all amounts will be sort into numeral order - then check for duplicate figures.