On 2018-01-30, Graham wrote:

looking for something else last week, I came across an installation manual
with large letters on the front "DO NOT LEAVE WITH CUSTOMER"

That was printed on the installation instructions for my Gloworm
boiler.

Something like "Not to be read by the patient" used to adorn medical
notes hanging from the foot of hospital beds.

Did they leave that there if the patient was sufficiently able-bodied
to reach it? Something like that would certainly get my attention &
I'd try to get a look at it.