As a business owner, as you deal with your clients, do not throw ANYTHING away. file it, scan it and save it to your hard drive, but don't toss it!
I did a wedding 3 years ago and met with the groom to deliver the album (I know, don't say it) and he loved it and took it home. The wife saw it and was not happy. She did not like the image choices I made for the album (I had just started doing digital albums back then and did not involve the couple in the selection). After agreeing to redo the album, I discovered the REAL reason for the problem with the album - there was ONE shot of people on the dance floor and in the shot was the grooms' ex girlfriend - why she was there is another story

I sent them a letter certified mail, return receipt letting them know that they had 60 days to make their image choices and I would redo the album and I never heard anything back from them.
Fast forward to today and I get a message on Facebook from the groom asking about the status of the album

I remind him about the letter I sent and how the delay was because I was waiting for them to respond back. After the "reminder" he responds and tells me to just reprint the ORIGINAL album.
I didn't even ask and just told him I would ship it when it was done. I know if I had not sent that letter I would not have a leg to stand on and would probably be in small claims court or on Judge Judy.....