I've taken my TDI to the same place for all of it's tests. Neuspeed intake which has the sticker. The tech certainly did not go look it up, but quite possibly saw the sticker so moved on.
Diesel can have 2 monitors "not ready," whether is failed or just not set. Cannot have an active CEL but a pending CEL still passes. Reset of the CEL sets all the monitors to "not ready" so that won't work.
I don't know how the station could "pass" me if that was something they willing to do (or that I needed). Whatever they are using for the tests just showed pass after he disconnected from the OBD.