German phrase
Ich bevollmächtige ~.
Meaning
I authorize ___
When to use it
It gives someone authority. It is formal and suits official tasks or simple arrangements.
Example dialogue
Ich bevollmächtige meinen Bruder, das Paket abzuholen.
I authorize my brother to pick up the package.
Hat er die Vollmacht dabei?
Does he have the power of attorney with him?