blitt&gaines

Hi. I became delinquent and I also received a letter from Blitt and Gaines, stating that they had been 'retained', and were attempting to collect a debt. Is what they're doing even legal? Is it a joke? And if what they do is legal, how come they don't show their real faces on their website? Usually lawyers who are operating legally have no problem showing their faces. Has anyone ever seen or know what they really look like?