I am recreating a transfer form we currently have on paper into an Excel spreadsheet to have it electronically emailed. In the form I have a section that asks the user to choose a desired station to transfer to from a list of 3 stations with check boxes next to each station. I would like to have it to where the user can only check one box at a time. In other words if the user would like to select two stations, when the user selects a second box from the list to click the first box the user clicked would be unchecked leaving only one checked check box in the list. Thank you in advance for your help.