I just attended my son's soccer tournament and I took some pictures at another event on the same grounds. I was asked to send a copy to the owner if it turned out. I would like to send a proof via email. I have never tried to sell a photo yet and I have no idea: 1) How to imprint the copyright symbol with my name 2) Do I reduce the quality of the .jpg image or do I write "proof" over the image
Whether you do something more extreme to protect an image depends on how much you distrust the person receiving the file. Since you at least have the name of the party you're sending to, I wouldn't mess up the proof image too much - after all, you want them to be excited by the image and buy a nice print from you.
Friends of mine swear by it but I haven't tried it as it's a bit pricey. Photoshop (later versions - but I don't know about LE or Elements) comes with a limited version as standard. I'm not sure if Paint Shop Pro will accept the plug-in but you can download a trial version to try.
I hope this extra option is of help - after all, your son's footy match could one day become famous!
#4. "RE: Photoshop Print Security" In response to Reply # 3
The problem with Digimarc is that it only helps you prove a copyright violation, it doesn't provide visible copyright notice on the image and you won't see a pop up window unless you're using a Digimark enabled program (like Photoshop) and a compatible file format.
The digimark data may hold up to printing and re-scanning at full resolution, but it won't hold up to radical downsampling like you would do to make a web size file from a high res scan.
Digimarc is definitely worth the effort if you provide highres images for stock photo use.