Two of Ben's many passports from various countries under different aliases.  In Season Four, Episode Three ("The Economist"), Sayid discovers the passports inside a drawer in a hidden closet.  Among the passports are ones for Brazil, Japan, New Zealand, Sweden and Switzerland.  The name "Dean Moriarty" is used for both the Swiss and Canadian passports.  It is the Canadian passport that Ben uses to check into the hotel in Tunisia. 

(Season, 4 Episode 3, "The Economist")