Cant recall needing to fill mine neither and I was running REVO Phase1.
Its more likely that the dealer hasnt put enough in during the service. Printouts wont prove that a Tech has put the right volume of oil in.
I wouldnd mind betting its fine and you wont need to ad anymore.
The obvious advice to to keep an eye on it and take it back to VW if its consuming oil. Your warranty will cover it so youve no worries..
good luck
Paul
MKV 2.0T Gti FSi , Red, Heated Elec Leather, Armrest, Monza IIs, REVO Phase 1 - SOLD !!
S3 (8P) - Sprint Blue, Loads of trinkets....