what is pf pass book

no 

account slips( yearly statements) are issued by epf department every year, that solves the purpose of passbook

thanks....Mr. Sharma

can the employees directly send the form2(regarding change in family) to esi office instead of giving it to their employer

employer has just to countersign the form, this satisfy the ESI office that employee is still continued and eligible for all benefits, and yes employee can submit the form