On Wednesday, 24 July 2024 16:59:11 BST Peter Humphrey wrote:
> Hello list,
> 
> Is it possible to get CUPS to report the serial number of a
> network-connected printer?

Not from what I have come across.  The commands lpstat and lpinfo do not show 
the S/N of my networked printer.

I can't recall what a USB printer interface reveals, I haven't used a USB 
connected printer for more than a decade.

You should be able to find more information, potentially including its S/N, if 
you connect to the printer's GUI directly and access its admin control panel.