The first time I met a Dom, I had a safe call. I even think he may have insisted. I really can't remember which one of us brought it up. Anyway, I was going to be out of state, so it was important that someone know where I was going, who I was with, etc. I think the signals were if I said everything was fine that they were indeed fine, but if I asked her to please remember to let the dogs out for me (I don't have dogs and neither does she), it meant call the police immediately. I called my best friend when I left that morning. I called her when I crossed the state line. I called her when I got to the restaurant. I called her when I left the restaurant and told her I was going to a hotel. I called her from the hotel and gave her the name, address, phone number and room number. She told me to call after the session no matter how late it was, so I did. I called her when I left the next morning, when I crossed the state line and when I got home. As a backup, another friend of mine knew about it, though I didn't call that one. He did call me the next day to make sure I was still alive. lol I know it seems like a lot of calling, but you can't be too careful these days. If he's not a serial killer, then he shouldn't complain and could even remind you to check in.