Silly question? Not really. You would probably be very surprised by the number of individuals who do not include their contact information in their resume. Reasons include everything from simple negligence to a fear of sharing personal information. Regardless of the reason, it should be obvious that without your contact information you are wasting your time sending out your resume.
Our Web 2.0 era is one of disclosure and a fear of sharing information will more likely be construed as misleading or deceptive. The same impression will result from those choosing to use nicknames rather than their given name. A resume is a professional document used to sell yourself. If it does not contain the necessary information to contact the sender or if the information is not perceived to be genuine, factual or true it will be discarded.
The name you would use to sign a legal document is the name that should appear on your resume. Your address and a phone number that will most likely be answered by you rather than your three-year-old are imperative, as is your email address. If your email address is email@example.com or firstname.lastname@example.org, create a new one! A professional email address and consistent use of your proper name should be prevalent throughout your contact information as it is in the following examples:
Does your resume include your contact information?