Prosecutors said PW Marketing violated the state 's 1998 anti-spam law by sending unsolicited e-mail without a toll-free number for recipients to call to stop additional mailings .
Prosecutors said PW Marketing violated the 1998 anti-spam law because these unsolicited e-mails were sent without a free call number for recipients to phone to stop additional mailings .
James Rohr , chairman and chief executive officer , said PNC regretted the incident .