Originally Posted by
MP (Miles+Points)
[...]
And often, with foreigners involved, local police will appear pretty quick, and either you will be in deep trouble, or they apologise to you without reservation. [...]
^
Escalting this case to the policy would probably be the worst thing to do! Do not do this. It
could result in endless red-tape...
If you can't get rid of the apparent fake note somewhere else (=illegal as soon as you know!), just bin it.
The front desk agent wouldn't call the policy just for one (allegedly) fake note - they are way to common in China. However, if you'd tried to pay cash and c 1/4 of the notes are being marked as fake, you'd have a big problem