Yes, they can and his overstay will be a problem. However, he may qualify for a waiver. I suggest that you contact an experienced immigration attorney for a face-to-face consultation and give him/her all of the facts surrounding your father's situation. He/she would then be in a better position to analyze your case, advise you of your options and, if possible, make sure that the necessary paperwork and documentation is presented so as not to delay the process.
Answered on Apr 25th, 2013 at 11:40 PM