Rule 127¹³⁵
Notification by means of electronic communication

(1) Notification may be effected by means of electronic communication as determined by the President of the European Patent Office and under the conditions laid down by him. 

(2) Where notification is effected by means of electronic communication, the electronic document shall be deemed to be delivered to the addressee on the tenth day following its transmission, unless it has failed to reach its destination or has reached its destination at a later date; in the event of any dispute, it shall be incumbent on the European Patent Office to establish that the electronic document has reached its destination or to establish the date on which it reached its destination, as the case may be.