Invoicing format under rcm

Is there no need to show such invoice / RCM detail in GSTR-1???

Originally posted by : RAJA P M
	No need if You get bill from the Advocate. Just note the Tax details in the bill paid by You under RCM basis...

then what is the purpose of Section 31(3)(f) read with section 9(3) [i.e. notified supplies which are subjected to RCM], for which a self invoice need to be issued ?

An advocate firm, which is an unregistered service provider. Also, services from advocate falls u/s 9(3) [i.e. notified supplies]. 

Kindly clarify.