If the minor is travelling within Spain
They must carry express authorisation (not subject to an official format) from their parents, the absent parent, or the person legally exercising parental authority.
However, the internal regulations of some airlines may also stipulate that it is necessary to show the family record book. We recommend that you contact your airline to confirm the documentation that you may need.
If the minor is travelling abroad on their own, with a parent or with a third party
If the minor is travelling abroad on their own, with a parent or with a third party,
Once the permit form has been completed and printed, both parents or guardians must report to a Civil Guard post with their national ID card (DNI) or passport and the documentation proving their parental authority over the child (national ID card (DNI), family record book, etc.).
This authorisation is valid for 30 days.