Anzhi released the statement to finalise the 27m deal with a three-year contract expected to be worth 20.5m per season.
"Today an agreement was reached between the football clubs, Anzhi and Inter, for the transfer of Samuel Eto'o.
"The terms of the transfer are completely agreed on both sides. Anzhi expresses gratitude to the leadership of Inter Milan for their professional and constructive approach in the negotiations.
"Tomorrow the player will undergo a medical examination, following which the player will be awarded a three-year contract.
"On Thursday, Samuel will arrive at the location of his new team and will begin preparations for the match against FC Rostov."