Instrument of transfer requirement: companies must register share or debenture transfers only on production of a stamped, executed transfer. Companies must not register transfers of shares or debentures except on production of a proper, duly stamped and executed instrument of transfer delivered with the relevant certificate or allotment letter; the instrument must specify the transferee's name, address and occupation. The Board may register a transfer on terms of indemnity if a duly stamped instrument is proved lost. Prescribed forms, presentation endorsement by a prescribed authority, delivery time limits, specified exceptions for nominee and secured deposits, depository transfers, and administrative extensions govern compliance.