Yes, you should immediately speak wiith your supervisor. This is not only bad nursing, but it could potentially cause harm to the resident, then would be considered abuse. This nures has gotten into some very bad habits and may not fully understand the implications of her actions. If no one says anything just to "keep the peace" you become part of the problem. I can't image her signing someone else's name to something, this is a completely intolerable act. (not to mention probably illegal) Think of your resident's first and not only will you know the answer to your question but you won't be able to sleep at night until something is done about this very serious situation. SLEEP WELL TONIGHT!!