fcl licences in electronic format - How to use an fcl licence in electronic format issued by aesa?

Once the applicant has downloaded the printable version of the licence or certificate (the one that includes the verification code and the QR), he/she shall print it, sign it in handwriting and show the signed copy whenever required to do so by the aviation authorities and their agents, who may at any time verify the veracity of the licence by checking the corresponding CID, without prejudice to the legal obligations regarding the need to have a valid medical certificate.