sentences:  Furthermore, such a dissociation makes the prosecution of bribery offences easier since it can be very difficult to prove that two parties (the bribe-giver and the bribe-taker) have formally agreed upon a corrupt deal.In addition, there is often no such formal deal but only a mutual understanding, for instance when it is common knowledge in a municipality that to obtain a building permit one has to pay a "fee" to the decision maker to obtain a favorable decision.A working definition of corruption is also provided as follows in article 3 of the Civil Law Convention on Corruption (ETS 174)