Company may ask to show the original certificates for verification during interview, induction, joining, etc and but can not hold for indefinite period. Has the company issued any acknowledgment for keeping the original certificates? Has the employee ever submitted a representation in writing to good offices of the company to return the original certificates? Employee should have. Employee can even now ask ( in writing under acknowledgment) to return the original certificates in same good condition as at the time these were collected by company and . If the certificates are soiled, mutilated, spoiled etc employee can proceed against the good offices and keeper of the certificates.
During the employment was the conduct of employer rude, coercing etc? How was the employee treated at workplace? Employee should report such matter in writing under acknowledgment. Employee should record such incidences ( audio/visual).
This may help at appropriate time in appropriate forum and may lead to establish that employer was unworthy of being employed with.
It shall be appropriate to show the bond to a competent and experienced service lawyer.