it is illegal and shame on you for doing this to someone apoligize to them today immidiatly
Mr. Davis. He doesn't give a first name
Yes, you can be sued for defamation if you call someone a name, especially if the name is false and damages their reputation. Defamation involves making false statements that harm someone's reputation, and calling someone a derogatory name could be considered defamatory if it meets the legal criteria for defamation.
she never gave her a fake name
yes
That would be forgery.
It is true that to diagnose is to name a condition or disease of a patient.
unimaginativeperson.com
A last name?
Unfortunately, pretty near impossible. There are simply a staggering number of locations that people can file false information with.
Although they may ask, there is no existing law that requires that you give your name.
It is not a crime by itself. If you try to trick someone by giving a false name while you are committing a crime, then that is different.
That would be called the payee.