To upload documents to a clearance, they will first need to be scanned or photographed.
Option 1: A photo can be taken using a smart phone.
Option 2: Use a third party scanning app. There are many free, third party apps, like Genius Scan (Apple) (Android). These apps will take pictures and merge the forms within the app.
Option 3: Use a scanner to upload documents to a computer before attaching them to a clearance.