German phrase
Sie haben ~ vergessen.
Meaning
You forgot ___
When to use it
It says you forgot something. It is a gentle, polite way to point out a missed item.
Example dialogue
Sie haben Ihr Portemonnaie vergessen.
You forgot your wallet.
Oh, das ist ja mein Portemonnaie, vielen Dank fürs Aufpassen.
Oh, that really is my wallet, thank you very much for keeping an eye on it.