Hi,
FD32 - Usually, this transaction is controlled by Credit Management Team. Blocking this will not allow to post Sales Order, Delivery and Goods Issue. Invoice posting will be possible for already delivery goods.
FD05 - It doesnt allow to post any Finance posting.
VD05 - It gives option to block at different level. - Order Block, Deliery Block and Billing Block. There is further option to block at sales area level.
FD32 Vs. VD05
1. FD32 doesn't block billing. VD05 can block at billing as well.
2. FD32 doesnt give option to block at sales area level unlike VD05.
4. FD32 doesn't give to block Sales Order or Delivery Order unlike VD05
Hope, it clarify.
Thanks,
Deepanshu