Lou Robin, who for more than 30 years was Cash's manager, is working with the Cash children to legally protect their mom and dad's image, the Celebrity Justice reported.
Robin says there are now products being marketed that Cash and his wife would have never sanctioned.
"One time someone was selling shot glasses with his name on them," said Robin, adding another person made clocks with Cash's face on them and another company made postcards displaying his picture.
Robin says the Cash estate will continue to fight to protect the late star's image, adding proceeds from officially-licensed Cash products often go to charity because that's what the family wants.
2014: The Year in Music [PHOTOS]