Highlighting or even deleting duplicate records in Excel is simple but listing them isn't as easy. Fortunately, you can use Power Query to easily display a list of duplicate values or records.

Additionally, if you attempt to enter an invoice with a duplicate invoice number, most software will warn you. To create sequential invoice numbering manually, use a list of sequential numbers.

When a conditional formatting rule is overkill, use these VBA procedures to highlight duplicates and then remove the highlighting in Microsoft Excel.