Hindustan Petroleum Corporation Limited (HPCL), one of India's largest oil and gas companies, is launching a blockchain system to enable automatic verification of purchase orders (PO). In a joint statement, the two companies announced that HPCL has partnered with blockchain software company Zupple Labs to integrate its blockchain-based digital authentication technology into the PO system. Zupple Labs' verification technology, called Legit Doc, allows HPCL to issue digital POs to its suppliers without the need for manual PO verification. From the perspective of third-party validators, the project provides a tool for directly verifying the validity of POs in an automated manner on the HPCL website.