Client claims they didn't receive images?

[Paul]

If you have any proof that she received the images in some way that would definetly help your case because she does have the right to speak out against grievances if she really didn't get the service she paid for; however, this sounds like it might be crossing the line into defamation.

If I were you I would file a civil suit against her for defamation, and ask an immediate ruling for her to stop all contact, comments and postings until the suit is settled.

She cannot call you a scam artist without proof that you scam people. Print off all the emails, and messages she posted, and take them to a lawyer. If your business has decreased, you can sue her for lost wages, business, and perhaps even other damages as well.

I know, as a business owner myself, we are always afraid of looking heavy handed by taking legal routes, but we have just as much right to defend ourselves as do our customers, but in the future, you might want to mail things and require signature of receipt, and if you don't have all ready, put in your contracts that a customer must contact you within 90 days of the shoot that their photos have not been received or you might be unable to provide them with copies. Always have everything in writing and signed.