Pasting photos on application forms?

Question

which is the economically feasible making sticky application form and making photos with roughside behind to stick to the application form or makin passport size photos with sticky stuff behind it or stapling the photo (which is not preferred by anyone )or simply rippin the photo off stick it with gum .

Answer 1

Paperclips tend to work best.

Answer 2

super glue

Answer 3

You attach them together with photos on the email and send them at once.