Do you have to pay taxes on Bitcoin revenues? Disclaimer: this is not legal advice, and this varies from country to country.

If you accept bitcoins as payment, do you have to pay taxes on that? And would you have to write an invoice? Since they are not an official currency, such a trade would be considered a barter or what?

I.e. what's the legal status of someone accepting bitcoins as payment, and what is him required to do?
In Denmark (Europe) I have looked into this with a friend of mine, and we came to this conclusion.

Here, you will have to pay tax and do an invoice regardless of the currency. It is trade taking place within Danish borders, and therefor tax applies.

Although, these are rather old laws, and not very well updated. For example, a trade between two Danes going through a PayPal service, should technically be treated as a foreign trade, since the payment leaves Danish borders.

But modern day lawyers have no need to go after this, and as far as I can tell, no one have ever been "caught in trouble" with the legislation like this.

A interesting ruling was that the Danish tax authority once started creating accounts inside the game Second Life, and demanded tax cuts on the currency, even though it was "fictitious" and digital...

Although, they did not have much success with this.