A man in Switzerland received anonymous threats after flying a Jack Daniel's flag outside his house - because his neighbours confused the Tennessee whiskey brand's logo for that of ISIS.

The man, 29, of Italian background, came home to a threatening note in the mail after displaying the a flag with the Jack Daniel's logo in Zurich, Switzerland's biggest city.

The letter was signed by 'concerned neighbours', who according to local media wrote they would put the man and his girlfriend under watch.

Big mistake: The man hung a flag like this one outside his home, which his neighbours confused for the black flag of ISIS

The man, who wished to remain anonymous, said: 'I hung it up, because I found it funny.'

However, the joke was completely lost on his neighbours who mistook the famous logo of the Tennessee distiller for the black-and-white ISIS flag.

It read: 'Should we be afraid of you? First the Italian flag and now the black flag of death.'

He said: 'I was completely flabbergasted when I read it.'

Easily confused? This is the flag of the Islamic State, which the neighbours confused with the logo of American whiskey distiller Jack Daniel's

The man said he does not know who exactly wrote the letter.

He said: 'I talked to the neighbours but no-one knows anything about it.

'We want to address the responsible person or persons. When it is wrongly told that we are supporters of ISIS, it is defamation.'

Removing the Jack Daniels flag is completely out of the question, according to the man, as 'then we would prove them right'.

The Zurich cantonal police said that in such cases after receiving an anonymous note it is recommended to inform the police.