Recently asked and answered on the pre-law advisors listserv:
Q: Is it possible to edit a current recommender’s contact info [on the LSAC website], or do I need to recreate them? I can’t seem to update this information any longer after generating the form.
A: (from LSAC) Applicants cannot edit the recommender information once it has been entered, but they may write the corrections on the printed form and LSAC will make the changes when the form and letter arrive.
Q: Is it possible to fax the LORs (to LSAC), or do they have to be physically mailed?
A: (from LSAC) LSAC will accept faxes that are signed, although originals are strongly preferred because it is easier to create a clear image of the letter to send to law schools.