To whom should I send my case documentation for a case that could NOT be located at the BEC?

According to the Labor Department:

Send the above information to the appropriate BEC based on where the case was filed. The information should be addressed:

For Philadelphia BEC:
ATTN: No BEC Contact – Case Documentation
U.S. Department of Labor
Employment and Training Administration
1 Belmont Avenue, Suite 200
Bala Cynwyd, PA 19004

For Dallas BEC:
ATTN: No BEC Contact – Case Documentation
U.S. Department of Labor
Employment and Training Administration
700 North Pearl St., Suite 400N
Dallas, Texas 75201