Notice of appeal must be filed with the EPO within two months of the date of notification of the decision appealed from. The notice is not deemed to have been filed until after the fee for appeal has been paid in the amount laid down in the Rules relating to Fees under the EPC. For appeals filed on or after 1 April 2018 by natural persons and entities referred to in Rule 6(4) and (5), i.e. small and medium-sized enterprises, non-profit organisations, universities and public research organisations, a reduced fee for appeal is payable (see the Notice from the EPO dated 18 December 2017, OJ EPO 2018, A5). Within four months after the date of notification of the decision, a written statement setting out the grounds of appeal must be filed.