Originally Posted by
GagaPilot
Are you expecting any sort of reimbursement, compensation, etc from DL regarding a past flown trip?
If not, this seems like it has scam written all over it.
But if you are, it could be referring to the six character confirmation code (PNR) for your affected trip.
This is how they pay EU261 claims and is likely legit if OP filed a claim. The requirement for entering 6 character PNR confirmation code is just there for additional fraud protection.