"Can you give these documents to Alice?"
Translation:Tu peux donner ces documents à Alice ?
This "can" may or may not be just a polite way to give an order, especially since there is no "please". The speaker may be asking whether the other person has the possibility or opportunity to perform the action.
That is what will distinguish "tu peux donner/vous pouvez donner" from "tu donnes/vous donnez".