German phrase
In welchem Format sollen wir ~ einreichen?
Meaning
What format should we submit ___ in?
When to use it
It asks which format to use. This polite, formal wording suits administrative contexts.
Example dialogue
In welchem Format sollen wir die Bewerbungsunterlagen einreichen?
What format should we submit the application documents in?
Am besten per E-Mail als PDF.
Preferably by email, as a PDF.