That's the ESD (Europen Unions Saving) directive which Switzerland agreed to. So (I think 35%) now of interest related gains is anonymously delivered with a win

That's the ESD (Europen Unions Saving) directive which Switzerland agreed to. So (I think 35%) now of interest related gains is anonymously delivered with a wink to the country where the secret account holder resides. Here in Denmark tax authorities have used that anonymous amount transferred to estimate amount of money in Swiss banks which is supposedly enormous. They've also gone further, like confiscate data about years of foreign credit card payments by Danish shops and search out anyone using a card from a foreign tax haven country based on e.g. shipping addresses for online shopping, or address supplied for hotels and airplane tickets. Except a few high-profile cases like a famous golf player, this had curiously limited criminal consequences, seems like 98% of those caught where just told to pay the tax and interest on the suspicious amounts. The next step in the tax fraud battle is analysis of all bank payments from Danish bank to any bank in tax haven countries. The credit card analysis was done in Sweden previously, so it wouldn't surprise me other countries started using that method as well.