As you have asked about the institutes who provide Diploma in Corporate Law and management, I am giving you the list, you can check from these institutes

Campus Law Centre, Univ, of Delhi
(BCI Approved)
(Affiliated to DU, Delhi), Delhi
Guru Gobind Singh Indra Prastha University
(BCI Approved)
Kashmere Gate, New Delhi
Phone: 91-11-23869313 / 23869316 / 23869314 & 23864825-26, Extn.-150 & 152
Fax: 23865942


The Indian Law institute
(Deemed University)
Bhagwandas Road, New Delhi-110001
Phone: 91-11-23387526
Fax: 91-11-23782140

Global Institute of Intellectual Property
45, FF, Okhla Industrial Estate, Phase III,
New Delhi - 110 020
Phone: (011)-3088 4000, Fax - (011)-3088 4034

Indian Academy of International Law
(The Indian Society of International Law)
V.K.Krishna Menon Bhawan
9, Bhagwan Dass road
New Delhi-110001, India
Phone: 23384458/59

Law Centre NO - II, A.R.S.D College
(BCI Approved)
(Affiliated to Delhi University, Delhi)
Dhaulakuan

Amity Law School
(BCI Approved)
(Affiliated to Guru Gobind Singh Indraprastha University)
E-27-Defence Colony, New Delhi - 110024
Phone: 26326800, 26325335-6, 26325901-07

Faculty of Law ( University of Delhi)
Chhatra Marg (North Campus)
Delhi-110 007
Phone: 27667483
Fax: 27667483