The game guide
8.1 My current offers
This is where you manage the arrivals and departures of players at your club. All offers that you received and that you sent are displayed on this page, you can then cancel, refuse, accept or even negotiate offers.
Warning negotiations stalled for more than 3 days are automatically canceled.
There are two periods of mercato for each season, mercato before-season and mercato mid-season ( after 11th match).
Negotiations, transfers can take place throughout the season, However, the players change clubs during the period of Mercato. At each transfer made you will know the date of arrival of your new player. An exception you are entitled to one player joker can happen before mid-season. Loans can only take place until mid-season.
A manager may decide to set a release clause for a player, the manager believes that after a certain amount he doesn't oppose the departure.
Some players may for various reasons find themselves free and without club, then it is possible to contact the player to offer him a contract, then the transfer is free. Offer the player a contract directly ( free player or player in his last year of contract ) can the day after the first return match of the season.
A player can't change clubs twice in the same season.