A - You have a PIN to use with your Library card when borrowing Laptops from the LapSafe and borrowing other items using the Self-Service machines. Your pin must contain at least 1 upper- and 1 lower-case character and 1 number. It can't contain special characters. By having a PIN and not sharing it, others will be unable to borrow from your account. Fines can be expensive, and the replacement charge for a Laptop is £1700.