German phrase
Ich habe ~ eingecheckt.
Meaning
I've checked in for ___
When to use it
It means you checked in. For flights, this often means choosing a seat and getting a boarding pass.
Example dialogue
Ich habe meinen Flug eingecheckt.
I've checked in for my flight.
Super, dann hast du schon die Bordkarte.
Great, then you already have your boarding pass.