While at negative standing with a syndicate, attempting to turn in more than 1 medallion of any type breaks the turn-in UI.
Example: I am an -15,428 standing with Perrin Sequence (rank -2) and a remaining daily standing cap of 24,654. I have 7 basic quittances, 1 excecutive quittance and 20 universal medallions. Attempting to turn in a basic quittance gives the following UI:
Attempting to type a number in the box or use the "max" control results in -57 being displayed. Using the single "decrease" control will result in a value of 0 if it is at 1, or does nothing otherwise. The "