Contract: Jun 2014
The Russian club released a statement on their official website confirming the transfer, and are expected to pay the Italian club €28 million for the player's rights, while Eto'o will receive €20m per year during his stay in Dagestan.
Delegates from Anzhi met with Inter officials on Wednesday, and Eto'o has since passed a medical in Rome, completing the formalities of the deal.
The club's official release states:
"Inter striker Samuel Eto'o has signed a three-year deal with Anzhi Makhachkala. The player will arrive in Moscow tomorrow [Thursday] and will join the group in their preparations for the match against Rostov."
Eto'o spent two years at San Siro following a five-year spell with Barcelona. During his time at Inter he won a Champions League, one Club World Cup, one Scudetto, two Coppe Italia and a Supercoppa Italiana. He scored 53 goals in 102 appearances for the club, including 37 in 53 games in the 2010-11 season.
The Cameroon national team captain has also worn the colours of Leganes, Espanyol, Real Madrid and Mallorca during his illustrious career, and becomes ambitious Anzhi's most high-profile signing following the previous purchases of players such as Roberto Carlos and Balazs Dzsudzsak.