Hannah James, 26, was detained last month in the ultra-conservative Muslim state where Sharia law is enforced after her husband Jassim Alhaddar, 30, reported her to police.
Miss James’ family claimed that her allegedly abusive husband burned her passport when she tried to leave him and told authorities she was having an affair.
But last night the Daily Mail located Miss James’ passport in an apartment she had been renting with another man in Manama, Bahrain’s capital.
A concierge at the £75-a-night serviced apartment block said Miss James, a veterinary receptionist, had arrived with a Saudi Arabian man on December 6 before her husband found her and called police.
The worker also said that Miss James told him she had lost her passport shortly after checking in.
The employee, who did not want to be named, said: ‘This woman caused some trouble. She arrived on the 6th of December with a Saudi man and stayed for two or three nights.
‘But then her husband came here and phoned the police, he was very upset.
‘The police came and arrested her but the Saudi man ran away.
‘On the first day this woman had told me she had lost her passport.
‘But on Friday I found it behind the microwave in her room.
‘I rang her telephone number but it’s not working, I don’t know how to get it back to her.
‘I think this woman has been jailed because of what happened.’
Miss James’ was freed on Thursday night after a month in custody but her family claimed she was unable to leave the country because her husband had destroyed her passport.
It is unclear why Miss James or her family made the claim about Mr Alhaddar, a cashier at a pharmacy, burning her passport.
The family also accused Mr Alhaddar of violence and released pictures showing bruises on Miss James’ arm and face.