The company has reassured customers the stipulation is not a new rule. "We’re aware of recent media reports regarding Spain’s entry requirements and passengers needing to provide proof of funds for the duration of their stay," a spokesperson said.
"We’d like to reassure customers that this is not a new requirement and has been in place for some time.
"We recommend that customers carry their travel documents in person, or on a mobile device, in the unlikely event that you are asked for them at passport control upon arrival into Spain."