I also support Gaurab’s idea to tag the authoritative of account holder. Besides i would like to add one point with Gaurab's idea ; Can we send verification message through mail to account holder's corporate and technical contact person by quarterly/half a year/yearly basis?

if one of the contact person is not verify this information then account accessibility will be disable . Other wise it's really hard to make more reliable and accurate whois database that we are thinking .

+0.5

I've been proposing this for years now (earlier in Network abuse BoF) and recently did it in policy-sig and there was very mixed response. ARIN has this policy but as per Leslie Noble (ARIN) it is not very successful in their region but she also mentioned that they are planning to make few changes in the process (need to reach out to her again for the update).

For those who were not present there.. here is the transcript link

https://conference.apnic.net/data/41/20160225-Policy-SIG-2.txt

(hint: search my name)