Make sure that the courses for which you earned credit at your previous graduate school are directly relevant and applicable to your current (or future) graduate degree program.
Ensure that you received a B average or better for the credits you wish to transfer, as many university graduate programs do not accept credit for courses in which a student earned a C or below.
Request official, sealed transcripts from your previous graduate school. These will be needed to prove that accredited credits have been earned in your area of study at a previous institution.
Petition your current graduate school director for a transfer of credits. Most graduate schools offer specialized petition forms which must be completed and delivered to the graduate department (along with official university transcripts and a letter of intent to transfer credits).
Appeal denied credit transfers to the appropriate associate provost or graduate academic dean, who will act as an arbiter.