A clean spreadsheet isn’t enough if nobody can verify what changed. I built a small CSV and Excel cleanup demonstration around a 12-row messy customer export. The workflow: • preserved all 12 source rows • separated 5 accepted rows from 7 review rows • logged 39 cell-level changes • flagged 5 validation issues • identified 2 duplicate groups • reconciled every input row to the delivery The point isn’t the tiny dataset—it’s the delivery standard: assumptions, exceptions, change log, reconciliation, and repeatable tests. If you have a messy Excel or CSV export, I’m offering a tightly scoped first cleanup starting at $25: https://contra.com/s/2XBkUmRl-excel-and-csv-cleanup-with-verifiable-qa #Excel #CSV #DataCleaning #Automation