Are model releases necessary for portfolio

[spiralout]

I've been considering putting together a portfolio together for a while, and I finally have 6 or 7 images refined and ready to print. A couple of them, however, include people. As long as I'm not selling them, are model releases necessary to include these photos in a portfolio?

 

[Nagala]

No. (I'm not an intellectual property attorney.)

 

[Hertz van Rental]

No. You are not selling the images and putting them into the public domain so no release is necessary. Some info:
http://www.pdnedu.com/pdnedu/resour...t_id=1000694456
But use the search facility. This question is often asked. Two threads here. You'll find more.
http://www.thephotoforum.com/forum/showthread.php?t=17367&highlight=model+release
http://www.thephotoforum.com/forum/showthread.php?t=15892&highlight=model+release