In article , cr818@FreeNet.Carleton.CA says... (reference to post describing a wedding package including negatives deleted)
>I would suggest that if you want to make money at wedding photography >that you do not include the negatives with the order. You'll never get
>reprints that way, and you are tossing away your copyright. If you >want to reprint any shots for your own promotion you have to have the
>negatives. Even if you make prints for yourself before giving the negs
>away, the client could ask you to cease using their image as they hold >the neg and the copyright with it.
(good comments about professionalism deleted)

The above may (or may not) be true in Canadian copyright law, but in
the U.S., unless you have specifically signed away your rights to the copyright protection of your photographs, you still own the rights to the photos even though someone else has posession of the negatives, transparencies, prints, etc. (YOU control the uses.)
Hope this helps.