It was announced during Spain's victorious Euro 2012 campaign that the left-back, 23, would be signing for the Catalan club for a fee of 14 million euros.
Barca have now outlined the process by which Alba, who scored Spain's second goal in the final against Italy, will officially become their latest acquisition.
"On Wednesday morning he will come to the club's offices to have the traditional photo session in front of the Barcelona badge," read a club statement.
"On Thursday he will officially become a new Barca player for the next five seasons. On the same day Jordi Alba will take his medical, sign his new contract, have the customary photo session at Camp Nou and offer his first press conference as an Blaugrana player."
Alba gave a press conference in Valencia on Tuesday as he said goodbye to the club that propelled him to international recognition.
The attack-minded defender, who was a Barcelona academy player between 1998 and 2005 before moving to Cornella and then Valencia, said he could not resist the chance to return home.
"I started in L'Hospitalet and then I spent eight years in Barcelona," Alba said. "I learned a lot, but now I don't ask myself if I was fired or not - I left with my head held high because I had great confidence in myself.
"Valencia gave me the opportunity and I am grateful. I come home to be with my family and my people."