Write a note on UDIN and eCSin.

UDIN: The Unique Document Identification Number as governed by the UDIN Guidelines shall verify the authenticity of various documents signed or certified by Company secretaries in Practice. As per the UDIN Guidelines, a unique number for the identification of documents attested by Company Secretaries in Practice shall be generated at the time of signing the Certificate/ Report which shall mandatorily be mentioned in the Certificate/Report along with the CoP number. eCSin: The Employee Company Secretary Identification Number as governed by the eCSin Guidelines shall enable the Institute to identify the appointments and cessations of Company Secretaries. eCSin is a system generated unique number for identification of the Company Secretaries employed in a particular company which shall be generated by the Company Secretary at the time of employment as a Company Secretary (KMP or otherwise), as well as at the time of demitting office in any manner. Both the Guidelines have been made mandatory by the Council of ICSI w.e.f 1st October, 2019.