German phrase
Können Sie mich benachrichtigen, ~?
Meaning
Could you let me know ___?
When to use it
A polite request to be told. It suits formal updates by email or in person.
Example dialogue
Können Sie mich benachrichtigen, sobald die Unterlagen fertig sind?
Could you let me know as soon as the documents are ready?
Natürlich, ich informiere Sie per E-Mail.
Of course, I'll let you know by email.