I believe that it is illegal to pretend to be someone else that actually exists. However, if you are pretending to be no specific person, and just lying about your description, it's perfectly fine. It is also illegal to pretend to be a Doctor, or any other authority figure. By the way, as long as you are not DIRECTLY disguising yourself as someone (I.E your best friend), it's legal.
yes
No she has no need to.
ingore
If you are trying to defame and/or defraud someone of goods or services, yes.
Yes, it is illegal to have a bill in someone else's name without their permission.
By Being yourself, don't pretend to be someone else
It is illegal to alter someone else's check.
No it isn't illegal to purchase a car for someone else, but you will be responsible for payment.
Yes, it is illegal to tow someone else's car without their permission.
Pretend to be someone else
no it is illegal t open someone else's mailbox
When people pretend they are someone else so they have access to files.