The submitting screenwriter didn't go to the trouble of doing something as important as targeting a specific person. Besides telling the production company that the writer is not one for research or attention to detail, how is the writer going to track down their script when they follow up with a call? Whoever gets the script to handle won't feel on the hook to respond one way or another because they are anonymous to the writer. Get a name of the likely script wrangler of the company you're submitting to!