The Dublin-based company said its initial offer to Woods, who was estimated to have earned $100 million annually in endorsement deals before taking an indefinite break from golf in December, covered a five-year period.
Woods did not set a date for his return to competition when he spoke to media last month for the first time since the scandal over his private life erupted.
Paddy Power lost 1.5 million euros (1.4 million pounds) by paying out to those who had gambled on Woods after just 36 holes of last year's U.S. PGA Championship, which the world No.1 eventually lost to South Korea's Yang Yong-eun.