I don’t think Fiverr will implement this option. Why? Exhibit A: Buyer asks for a logo. You make them a logo 3 days later, Buyer edits message saying he wanted a banner. You tell them they wanted a logo initially. Buyer plays games with you, reports you to Fiverr Support. Editing messages is an easy way for manipulation to happen. It would be our worst nightmare. Yes, you are right. I had not thought it out past just wanting to correct a typo 🙂