Former Co-Worker Contact?

[Munchkin03]

Okay, so I quit my job a few weeks ago and started at a much better one. The problem is one of my co-workers, who was the Project Architect on a high-profile project I was working on. He was a major reason in why I left, but not the only one. Basically, he tried to keep me under his thumb--monitoring my arrival to and departure from the office, getting angry when I left work on time (as opposed to late), calling me on my cell phone when I'd go downstairs for a bathroom break--you name it, he did it. When I finally quit, I thought I'd be rid of him.

Not so fast!

He sent me a voicemail this morning, basically saying that HE (not my actual former supervisor, not HR) wants an expired security badge from that project. I haven't seen that thing since the beginning of the year; I gave my current one back to the Project Manager (our supervisor) upon my resignation. I do not intend on calling him back, sending the badge back, or anything like that.

However, is there anything I can do as far as HR or even a lawyer is concerned? I really feel like I need to cover my ass...