This is the shocking moment a British tourist SLAPS an immigration officer after being hit with a $4,000 fine - for overstaying her visa.

Auj-e Taqaddas, 42, arrived at the Ngurah Rai International Airport in Bali, Indonesia, on Saturday (July 28) night to catch a flight to Singapore.

But after receiving her boarding pass, she went through immigration checks where officers noticed her month-long visa had expired on February 18.

Auj-e, who is of Pakistani descent, was taken into an office at 9.25pm where airport staff told her she had to pay a $25 fine for each of the days overstayed.

Having been in the country illegally for 160 days, she had to stump up a staggering $4,000.

The bill sent Auj-e into a foul-mouthed rage and she was caught on camera branding immigration officer Ardyansyah, 28, a ''f***ing basta*d''.

When she tries to snatch back her passport, Ardyansyah quickly pulls it away - and she retaliates by slapping him.

Immigration Chief Ngurah Rai Aris Amran said: ''She slapped the officer, who is a respected guard. She touched immigration, which means touching representatives of the nation. So we reported it to the police.''