If you plan to take less than 12 credits in the semester in which you will graduate, you should consult with Financial Aid about being a part-time student in that final semester. Generally speaking, most student need to be full-time status (12+ credits) each semester while pursuing an undergraduate degree. There are certainly exceptions to that statement though. For most students, if it is your last semester, part-time status is OK, but you may need to have at least half-time status (6-11.5 credits) to receive aid, be eligible for loans, etc. Financial Aid can answer your questions on this in regard to your individual specifics.
Also, students should consult with Financial Aid if the placement of credits into the graduate level via senior rule will drive their undergraduate credits below 12.