Yes, absolutely go with the RIR. Only thing I might adjust it whether I let
the customer launch a dispute with the RIR before or after I make the change
and to me that would depend on the preponderance of the evidence either way. I
might give the long term customer the reasonable doubt. A new customer with a
new advertisement not so much. Talk to your legal people of course but I would
think if the RIR could verify a dispute in progress, you are covered until the
dispute is resolved. Seems legally reasonable to me and shows due diligence on
your part without you getting in the middle.
>There is a definitive technical means. It's called contact the POC published
>in WHOIS by the RIR and ask. It isn't flawless and you don't have to like >it,
>but there it is.
>If you contacted the POC and the POC replied stop, you stop. If the POC was
>hijacked at the RIR, that's between your customer and the RIR.
>The RIR has a standard process and an expert team for dealing with these
>situations. It's their job.