Our industry is a service industry where we deploy employees to customer sites or factories to perform mechanical-related jobs on earthmoving equipment. When our deployed employee is covered under ESI (Employee State Insurance) but is sent to a factory located in an area where ESI is not implemented, the factory authorities are requesting Workers' Compensation (WC) policy coverage for that employee to allow him entry into their premises for work. The employee always carries an ESI Pehchan card with him. How can we resolve this issue?