If the parties do not receive the letters sent by the bailiff, this does not prevent the enforcement, however, in this case the parties cannot assert their rights (e.g. right of appeal). The documents sent by post shall be considered served on the day of attempted delivery even if the addressee refused to accept it. If service failed because the addressee did not accept the document, the document shall be considered served on the fifth working day following the day of the second attempted delivery until proven to the contrary. /Artilce 137 of Act on the Code of Civil Procedure/.