Is it mandatory that such ‘reasons to believe’ has to be recorded in writing by the proper officer, before issuing authorization for Inspection or Search and Seizure?

Although the officer is not required to state the
reasons for such belief before issuing an authorization
for search, he has to disclose the material on which
his belief was formed. ‘Reason to believe’ need not be
recorded invariably in each case. However, it would be
better if the materials / information etc. are recorded
before issue of search warrant or before conducting
search.