>> Jane is shilling for a new variant of the "Nigerian check scam", <<

Yep.

Lurkers:
This version of the "Nigerian check scam" works something like this:

The mark is offered money to wrap their vehicle in an advertisement.
If the mark accepts, the scammer tells them he will send a (large) check.  The mark is supposed to deduct their advertising fee, and send the rest to the artist, or shipper, or somebody else.
So, the mark "cashes" the check, and sends the extra money via Western Union or other quick means.
But ... then ... the bank informs the mark that the check bounced, was forged, or stolen.
So, the mark is "out" the amount of money sent back to the scammer, and is in legal trouble because of the attempt to cash a forged / stolen / rubber check.  In fact, this is often considered "money laundering", with even more penalties for those who are involved.