Villagers queue outside a bank in Hanuman Ganj village on the outskirts of Allahabad. Pic/AFP

New Delhi: The Supreme Court yesterday dubbed as a "serious issue," the long queues outside banks and post offices and expressed its reservation on the Centre's plea seeking a direction that no other court in the country should entertain petitions challenging the November 8 notification demonetising R1,000 and R500 currency notes.