Not Strictly a Tech.log issue, but have had a No. 1 cabin crew member from a Customer Airline my previous employer supported, wrote in the Cabin Defects Log,
Cabin Log Book Missing From Aircraft.
and was verbally supported by the Captain indicating that one needed to be issued to the Aircraft.
We also used to get alot of, "Oh! and by the way", or "Just for your info", as the flight crew were stepping onto the bus to go home....
If they were that concerned why not stick it in the book.
To which alot of replies of "Ok, I'll bite check the So and So box", or "I'll Look into the TSM".