How many times has a client come in with a great piece of evidence only to find it is ruined because they have indelibly added their testimony to the face of it in blue or black ink. It is as if the intense need to control events blots out any kind of judgment they might have had, or restraint to action until they can get some legal advice.
I can hear the objection already, the document is not authentic because the author is undetermined.
Or in the case of a bank statement which was certainly produced by the bank, but who wrote “Uncle Charlie told me I was supposed to get this!!!” on the face of it?
I have vivid memories of a judge examining the offered exhibit then angrily declaring “Some one has written all over it!” knowing that someone was seated at counsel table next to me.