The words "Maximum Capacity" at the bottom of the page expand when clicked to reveal "If your messenger refuses delivery due to size/value/fragility or possible illegality, a cancellation fee will apply"
With cats, I suppose couriers might refuse them -- walking down the street with a cat carrier would be kind of unpleasant, and it would be worse on a bike.
But I honestly doubt anyone ever trusted us with drugs, the most memorable things I delivered were A) a pee cup (luckily empty) and B) an industrial size sink from Wall St. to 42nd.
I can already imagine lawyers having a field-day on the words ‘possible illegality’.