Your Depop username cannot be changed once your profile has been created.
We know this can be a bit irksome to our plenty of users who like to mix up their style and rebrand themselves, and changing your name can be a great way to do that. We’d love to give you the option and therefore it’s something we’re working on as a priority, but right now unfortunately our systems don’t allow for it. We’re unable to provide a timeline for when this will change, but rest assured you will be the first to know. It won’t be long before you’ll be able to update your name to fit your new look.