You'd be surprised how honest people are when you ask them to justify their IP request. I've avoided countless spammers from getting on my network with that simple question.
True on this.
Problem is, real spammers, especially the ROKSO crowd have pre-prepped data to fool you. I mean full profiles, address, etc. all fluff, but yeah. This approach like most will only catch the lazy / stupid / junior style ones.
Only provider that has ever made me fill out a form for IP justification was 'Quick Packet'. It was a goofy ass .docx template IIRC. Seemed to be more about information gathering than anything. That was last year and I had a server with them for only one month (never used in production, I usually stress test new servers for multiple months first). Presumably they aren't involved in what you're getting at?
For most VPS hosts who are 'merely' renting space from larger organizations, the concept of IP 'justification' is kinda silly in that the allocations are usually too small to matter. Unless you're in love with superfluous micromanagement, I guess.
In fairness justification is supposed to per ARIN be recorded for anything larger than a /30 allocation (do I have that right IP guys?). Transmitting that data to ARIN and especially public posting that data isn't really required. ARIN was busting chops for a year plus before IPs ran out demanding full justification with details from some shops. Problem is, that data while ARIN wanted it and got it, ARIN claims no liability if such is accidentally released to public, hacked, etc. Meaning they give no fucks about privacy especially of private customers using their bed location address.
Now in fairness, ARIN does have policies about WHOIS and related, a whole policy subsection, which says private customers can be masked. The stop short of saying it should always be done, but any company not doing such is as inept as it gets and sitting on a potential legal slap. Would you be happy if [name that store] transmitted your data to its vendors and then those vendors resold, bundled, aggregated and otherwise exposed you as a shopper of [name that store]? Yeah I know, some people care less than thise corporate machines, cause they can't focus and see the big long term picture.
QuickPacket is good people. Nope, not them. This was just a general heads up.
At this point, anyone on about IP justification in an ARIN area, meh, I think they are smoking dope. IPs are goner kids. What the heck needs justified? Not like you can get more ARIN IPs unless you rob your bank to pay for them. Can't see ARIN caring about deals involving large sums of money... Always thought ARIN was here just to rapidly allocate IPs and that's it. ARIN's role now is what? Having meetings, getting ready to be instrumental in IP sale market, what else? Hoping IoT leads to IPv6 supervisory role? I guess. Goons in suits that algorithms could have replaced 15 years ago.