German phrase
An welche ~ soll ich ~ schicken?
Meaning
Which ___ should I send ___ to?
When to use it
It asks where to send it. It sounds polite and slightly formal.
Example dialogue
An welche E-Mail-Adresse soll ich die Einladung schicken?
Which email address should I send the invitation to?
An meine Uni-E-Mail-Adresse, bitte.
To my university email address, please.