You can easily checked which properties have currently active discounts applied and also what kind of discounts have been applied.
To view the discount overview go to Properties > Current discounts.
Please note:
This page does not include vouchers or special offers.
It will just list any discounts you have added via the main property discounts page found under Properties > Edit > select Discounts in the drop-down menu > Go.
You can use the link Toggle Details to show the particulars of any discount applied.

