Ask yourself if you even need the error message. Before writing anything, consider if there’s a way to redesign the experience so there’s no error at all.
The best error message is no error message.
Writing clear error messages can reduce frustration and help people continue using your app or service.
Keep these tips in mind: Say what happened and why. Suggest a next step. Find the right tone. And don’t forget to read the message out loud and take out any pesky jargon.
by Tobias Van Schneider in How to write UX copy that makes your product a joy to useby Tobias Van Schneiderin How to write UX copy that makes your product a joy to use