Send documents from any device and from anywhere with the same legal validity.


Send documents urgently and securely


Send a digital, ordinary or certified letter


Send digital postcards online


Print out your labels and pay for your deliveries before going to the Post Office

PAQ 48

Delivery in 24/48 hours, depending on point of origin and destination

Certified Letter

Guarantee reception with a signature

Administrative Notifications

Suitable service for legal communications


Burofax Premium Online

Send your urgent Certified Fax via the internet with signature on delivery.

This service is used for the urgent and secure delivery of important documents which may require third-party proof (signature on delivery). It is also very convenient, as it is done via the internet.

  • Geographical Coverage: España y Andorra.
  • Delivery times: 24 hours. (Except Saturdays, Sundays, and public holidays).

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Due to the extraordinary adaptation measures adopted by Correos from RD 463/2020, Registered faxes will be delivered by collecting the recipient's details without taking their signature.

This service is used for the urgent and secure delivery of important documents which may require delivery to be legally proven to a third party. The recipient's signature is always required on delivery. You can access this service from this page at "Send Online Certified Fax".

From Correos Post Offices to those of other organisations and private users in other countries who have a fax machine.

- Zone A: Europe, Turkey, Algeria, Libya, Morocco and Tunisia.

- Zone B: Other countries. (Ask in the Post Office which countries accept it).


A Registered fax can be sent from this website at "Send Registered fax Online":

  • Select the PDF format document you want to send.
  • Only valid or embedded fonts can be used in your document.
  • Select the recipients of your Registered faxes and the added values you want to order for each one.
  • Pay with a credit card, PayPal, or you can charge it to your Post Office account if you have one.

The delivery will be:

  • To the recipient's address.
  • To a Correos Office.
  • To a PO Box.


Guarantees: For delays attributable to Correos, the corresponding price for the Registered fax is reimbursed, not including added values.


Delivery times: Delivery will be the same day (for faxes sent before 13:00 to destinations with Special Delivery Units) or the morning of the next working day (for other cases. Saturdays, Sundays, and public holidays are not included).

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If you represent a company and would like us to make a personalised offer, request more information.
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