Haven’t written cheques in the last 25 years or more…

But I do recall writing extra text on them in the hope of embarrassing people I knew with such phrases as (The sum of:) “Fifty Dollars and fifty cents and not once cent more, not even if they beg”

I also remember a scam in the US where a company advertised some amazing product in magazines and after receiving orders for the item would write back and apologise saying the item was out of stock, with a cheque for the full refund – but the cheque was printed with the company name along the lines of “Anal Toys and Penis Enlargement Devices Ltd”

They made money from the reluctance for anyone to deposit their refund cheque at their local bank, but were ultimately convicted of fraud because they didn’t actually have any of the items they advertised for sale