Always include your logo in your samples. When they bought your image, you
can still either retain or not your logo in your photo as they can remove it
on their own.

Make one logo on the middle of your pictures.

Whenever you share your photographs with anyone make sure that you keep a
duly signed copy stating the terms and conditions and not using or uploading
your photographs without permission. Adding your logo as a watermark is an
intelligent step.

Great advice thus far. Also, google information about placing a "watermark"
over your photos. This is very common for photographers and does not take
anything away from the quality of the photo itself. In addition, whenever you
post you could use a low pixel quality version so if someone rips it off they
can't do much with it by way of commercialization. The watermark is a good
way to go..

Yes, you definitely need to protect this through your copyright, as it
provides better protection than merely having your logo on the picture
itself.

The main thing is to protect your copyright and make sure your customers
understand this point.
You can also look into watermarking your photos.

Hey Cassie,

You should definitely include a written copyright like mentioned by
BizResearcher. You should also include terms & conditions in which you would
provide guidelines as to where & how your photos could or could not be used.

This provides more protection than having your logo on the picture itself.
However, that said, if what you're goal is to advertise your services I would
suggest including your website or facebook page instead of your logo that way
they know where to find you. Just make sure you do it in a tasteful way.

When you give a client a disc, you also need to give them a written copyright
release so they can make copies of the photos. If you leave your logo on the
photo, they won't be able to obtain a clean copy.

In your copyright release you should include wording that indicates that the
photos cannot be shared on the Internet, reprinted for any reason other than
personal use, or used commercially without giving you credit. Have the client
sign the copyright release, then make a copy of it for your files. When you
present the disc, you may want to point out the section of the release
containing the restrictions.

If you are in the habit of mailing the discs, then email the release first
and tell the client that when you receive a signed copy back you will mail
the disc. Many people are unaware of the rights of professional
photographers, so pointing them out will both educate and protect.

Hi Cassie, Check out this blog post for information about how to protect your work.