Joe
The Grufls or Kofls could only report claims of e/a, balloons etc...
The Kofl then send the basic material further to the Kogenluft, who was the "one and only" which made the decision if an victory should be confirmed as a victory(with victory number), confirmed as jZlg(without victory number) or be unconfirmed...!
I am convinced that the Kogenluft decided that the destruction of tanks was NOT confirmed as victories...!
I have also seen Greims war merit record from the archive in München(but have lost the copy in some move.. >

).
In this list of Greims War merits(incl victories) the Kogenluft or Idflieg confirmation numbers are given, but no tanks are listed as victories...
The destruction of these tanks probably lead to some other recognition from the military authorities, like awards or "Annerkennug"..
However, also Osterkamp from MFJ II destroyed a tank...
What the decision the Marineflugchef made in this case is still unclear, but NO official material exists which verify any confirmation...so most certain unconfirmed...
On the other hand the German Marine confirmed destroyed boats by Flyers as victories...
:

Gunnar