While in disguise you have to memorise the password Bentley send you there are 3 places that have codes for passwords.

Venice Password Codes:

Triangle: Suprano

O: Alto

X: Bess

Square: Tenor

China Password Codes:

Triangle: Day

O: Moon

X: Night

Square: Sun

Blood Bath Bay Password Codes:

Triangle: Hole

O: Spaar

X: Gib

Square: Port

There are also different names of passwords for every level.

Venice Passwords:

Day time password: Alto,Alto,Bess,Bess

Midnight password: Alto,Bess,Alto,Alto

Last night password: Alto,Tenor,Tenor,Alto

Tereswee password: Suprano,Alto,Alto,Suprano

Carnivale password: Tenor,Bess,Tenor,Tenner

Cafe password: Bess,Bess,Bess,Suprano

Vacuum room password: Suprano,Suprano,Bess,Bess

Octavios house password: Tenor,Suprano,Tenor,Suprano

Secret suprano password:Tenor,Bess,Tenor,Tenor

China Passwords:

New years password: Night,Sun,Sun,Night

Crypt password: Night,Night,Night,Night

Wedding password: Sun,Moon,Sun,Sun

Sunset password: Day,Night,Sun,Moon

Bamboo forest password: Sun,Night,Moon,Night

Midnight password: Night,Day,Moon,Moon

Thursdays password: Sun,Moon,Day,Night

Temple password: Day,Sun,Day,Moon

Blood Bath Bay Passwords:

Skelloton password: Gib,Port,Spaar,Hole

Captains password: Hole,Spaar,Port,Gib

Crossbones password: Spaar,Spaar,Spaar,Spaar

Pirate password: Port,Port,Hole,Port

Skull password: Gib,Spaar,Gib,Hole

Storm password: Gib,Spaar,Gib,Spaar

Flagship password: Port,Hole,Spaar,Spaar

Island password: Port,Hole,Spaar,Hole