Texan company SCA Promotions has revealed its intention to sue disgraced cyclist Lance Armstrong for $12m (£7.5m).
The insurance company paid the 41-year-old bonus money when he won his fourth, fifth and sixth Tour de France titles, all of which were taken off of him last year after he was found guilty of drug abuse.
"We will likely file that lawsuit as soon as next week unless we get a satisfactory response from Armstrong's camp," SCA lawyer Jeff Tillotson told BBC Sport.
"As you can imagine, we paid him $12m for being the official winner of three Tour de France races and swearing under oath he was a clean rider during those races. He's now told us, at least through Oprah, that he lied when he told us he was a clean rider.
"He doped during all those races, and USADA (US Anti-Doping Agency) and UCI (International Cycling Union) have stripped him of his official title status. So under those circumstances my client naturally wants his money back.
"We have made a demand for return of the $12m and if that money is not returned to us, my client will pursue litigation. He feels Lance Armstrong neither has the legal right, nor frankly the moral right to keep those funds."
Armstrong confessed in an interview with Oprah Winfrey that he took performance-enhancing drugs throughout his career.
