I think an advantage of doing postal registration is that someone does not need to have access to the internet. Moreover, most people are much more familiar with filling out forms with paper. As we all know, computer forms have glitches which can be annoying and irritating. Have you ever had a question on a form that you couldn't answer and the form would not let you skip it? In our school district, all registration is now online, but the district always has computers set up to allow parents to register at the school with help if they need it. A strong disadvantage of postal registration is that someone must then enter the information into the computer system (which most schools use to keep track of records) and that takes a lot of personal time. With online registration, parents can update their address and other information, and it will appear on the records right away.