Should I use the same postage just add more?

Question

A letter came back to me for additional postage, should I use the same postage just add a few cents more? The label says to cross out the notice or paste stamps over it. What does it mean? should I re-mail them with whole new envelope and stamp?

Answer 1

You will need a new envelope and stamp. If they see the same one with post office stuff on it they will return it to you.