Trust act

 Prepare a Trust Deed on stamp paper of the requisite value

Requirement for registration of Trust Deed with the Local Registrar under
the Indian Trusts Act, 1882:

a) Trust Deed on stamp paper of requisite value

b) One passport size photograph & copy of the proof of identity of the settler

c) One passport size photograph & copy of the proof of identity of each of the two trustees.

d) One passport size photograph & copy of the proof of identity of each of the two witnesses.

e) Signature of settler on all the pages of the Trust Deed

f) Witness by two persons on the Trust Deed.

 Go to the local registrar & submit the Trust Deed, along with one
Photocopy, for registration. The photocopy of the Deed should also
contain the signature of settler on all the pages. At the time of registration,
the settler & two witnesses are required to be personally present,
alongwith their identity proof in the original.

 The Registrar retains the photocopy & returns the original registered copy
of the Trust Deed.

trust deed  link https://www.ngo.india.gov.in/ngo/rathnakumar.pdf

Is registration of a trust mandatory?

its mandatory ,