I didn’t verify this with my co-workers, but I’m pretty sure they did it. No one else has access to my wallet.
You may wonder if it’s safe to leave my wallet out on my desk every day, and yes, it is.
It isn’t safe, however, to leave a plastic or paper cup on your desk. The cleaners will take it. From Teashop 168, I got this promotional cup which allowed me to get a free refill on the 20th of every month, and it was thrown away. I tried to hide it too, but they found it. Sadness.