Availability or absence of a photo is not the crucial point in building a perfect resume or CV. But in some cases it is able to influence the final decision of HR manager concerning the choice either to invite you for the interview or not. Some career coaches suppose that it's incorrectly to place a photo in your CV. The others say that it's not prohibited. In fact there is no any definite answer to that question as it depends upon a number of various factors. If your potential employer asks you to supply your photo it's clear that a proper photo file needs to be attached. But one should pay attention to the fact that the attached photo should be an appropriate one. The resume or CV photo should meet its aim. That means the home photos, funny ones, glamorous and studio ones wouldn't be the right ones to choose. The best photo for a resume or CV is the one depicting a job seeker officially dressed, openly smiling and ready to work. If you don't have such photo ask your friend to take a picture of you or use the service of a professional photographer.
Be aware that the size of the photo shouldn't be too large in order to make the loading time shorter. If you wish to print your resume out and send it to your potential employer via post services make sure that it won't look worse on the paper.
Sending your photo in fax isn't the best idea as its quality would be extremely poor in output. In that way it is usually recommended to have the similar resume without the photo in the case you would be asked to send it via fax.
A good photo will provide you more chances to get the desired position if appearance doesn't play the last role for it. That goes for sales managers, models or promoters.