Can someone list me any German intelligence coup's of WW2?

For me the operaation Nordpole was a great success for Abwehr or SS. They could get equipment and new agents to get the newest info By Sending a secret message requisting these items or persona. And this lasted a couple of years and the Germans sent fake info back which made the operation seem working better than Any other.

 

I read somewhere,the SOE radio operators,purposely made prepared grammar mistakes,if they were captured,,,but these were ignored by London???

 

I suppose this was when the contact was seriously thought failed. Until then materials and agents were sent as if the line was not under nazi influence. Kph

 

All SOEs files were “supposedly “destroyed,in a fire,shortly after the end of the war, !!????