German phrase
Entschuldigung, das ist ~.
Meaning
Excuse me, that's ___
When to use it
It says something is yours. Use it to correct a mix-up or ask for an item back.
Example dialogue
Entschuldigung, das ist mein Koffer.
Excuse me, that's my suitcase.
Oh, Entschuldigung, das war ein Versehen.
Oh, sorry, that was a mistake.