(42)In order to promote transparency and competition, the payment service provider should not prevent the payee from requesting a charge from the payer for using a specific payment instrument. While the payee should be free to levy charges for the use of a certain payment instrument, Member States may decide whether they forbid or limit any such practice where, in their view, this may be warranted in view of abusive pricing or pricing which may have a negative impact on the use of a certain payment instrument taking into account the need to encourage competition and the use of efficient payment instruments.