I had to drop off equipment once towards the end of a contract while the usual people responsible for accepting the return were out of office. I found the head

I had to drop off equipment once towards the end of a contract while the usual people responsible for accepting the return were out of office. I found the head of IT, typed up a paper saying "Anonym29 returned their equipment to Mr. Head of IT on [date] at [time]", put my signature on it, got his signature on it, made a copy for him, and kept the original - I didn't want the risk of the chain of custody getting mixed up and possibly have the company come after me for the cost of the equipment. So maybe not "never sign anything" so much as "exercise good judgement in deciding what to sign, after carefully evaluating whether it will help you or hurt you to sign it"? Just a thought.