It's believed Diego Forlan has signed a two-year contract with Inter, but will only make the move official on Wednesday.
The striker has already been pictured on the Nerazzurri website after undergoing his medical.
However, it is reported the red tape issues with Atletico Madrid are holding up the transfer until tomorrow morning.
News agency ANSA claims he has put pen to paper on a contract tying him to Inter until June 30, 2013.
The 32-year-old is set to earn €3.5m per season plus €0.5m in performance-related bonuses, which is a wage cut of €0.5m from his pay-packet in Madrid.
Forlan attended a meeting at the club headquarters this afternoon with his agent, Inter Vice-President Rinaldo Ghelfi, technical director Marco Branca and director of sport Piero Ausilio.
“Inter are a great squad full of excellent players,” the Uruguayan hitman told the Gazzetta dello Sport.
“We have a good chance of doing well in every competition. I may be 32, but I feel in great shape.
“Besides, in my family we all seem young for our age.”