Acknowledgement of receipt

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Receipt of requests for unitary effect filed via Online Filing (eOLF) or new online filing (CMS) is acknowledged electronically by the EPO. If the web-form filing service is used, an electronic acknowledgment of receipt will be displayed on the website once the files are transferred. You can also request that acknowledgment of receipt be sent by email. 
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For requests filed by postal services or fax, the EPO acknowledges receipt without delay by sending you page 4 of the request, on which it notes the date it received the request, the number of the European patent for which unitary effect was requested and the accompanying documents.  
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On request, the EPO will also issue fax acknowledgement of receipt, provided that:  
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a request for fax acknowledgement is enclosed with the request,  
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the postal or fax address to which the acknowledgement is to be sent is indicated, and  
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evidence of payment of the prescribed administrative fee is provided or a debit order enclosed. 

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