Yes and no.
In order to use the online submission service LSAC requires that letters of rec are uploaded only by the authors themselves (see the screenshot below). You can read more about the LSAC LOR service here.
However, we can send in hard copies of the letters we have in file in the House Office, provided you supply the LSAC Recommendation Form for each letter, as well as a stamped envelope addressed to LSAC. Information from LSAC regarding campus credentialing services is available here.