no, those things go thru metal detectors
No.
"Never use staples to close or seal your envelopes or packages. Mail sealed in this manner will not be processed by Distribution Services and will be returned to the sender. The staples can cause damage to postal equipment, injury to postal personnel, and will be refused by the US Post Office."
Better you don't use Stapler for the package, may use seal Tap or Mastered Gum.
No, it says so on pretty much every website belonging to anyone who mails stuff.
Use packing tape.
no u can't use staples ..... u need to use packaging tape to seal it better
i wouldnt. tape it
No.