This will happen automatically, once the end date on your 'sitter wanted' list is reached. If, for some reason, this didn't work, you can mark the assignment complete yourself, by visiting the 'Manage my sitters' page, and clicking the 'Mark this assignment as complete link, under the correct set of assignment dates. Please note that this link only appears when the start and end dates have passed. You can also contact us at the helpesk if you need any assistance.