The fact that it is a newer customer would make me talk to the RIR direct and 
verify that a dispute is really in progress.  I would also look at some looking 
glasses and see if the prefix is being announced elsewhere, if so that might 
indicate that your customer is indeed stepping on a legit owner.  I would also 
make it clear to the new customer that they are on thin ice here to light a 
fire under their process.  Let them know that it is up to them to convince you 
that they are the legit owner.  No one wants to lose a customer but they are 
threatening your business and putting you in legal jeopardy if they are not 

Steven Naslund
Chicago IL

>-----Original Message-----
>From: NANOG [] On Behalf Of Sean Pedersen
>Sent: Tuesday, March 13, 2018 12:39 PM
>Subject: RE: Proof of ownership; when someone demands you remove a prefix
>This is more or less the situation we're in. We contacted the customer and 
>they informed us the matter is in dispute with the RIR and that their 
>>customer (the assignee) is in the process of resolving the issue. We have to 
>allow them time to accomplish this. I've asked for additional information >to 
>help us understand the nature of the dispute. In that time we received another 
>request to stop announcing the prefix(s) in addition to a new set of 
>>prefixes, and a threat to contact our upstream providers as well as ARIN - 
>which is not the RIR the disputed resources are allocated to.
>This is a new(er) customer, so there is some merit to dropping the prefix and 
>letting them sort it out based on the current RIR contact(s). However, >there 
>is obvious concern over customer service and dropping such a large block of 
>I'm definitely leaning toward "let the customer (or customer's customer) and 
>the RIR sort it out" if the POC validates the request weighed responsibly 
>>against customer age. However, from a customer service perspective, I think 
>we owe it to our customers to make sure a request is legitimate before we 
>>knock them offline. With a limited toolset to validate that information, I 
>can't help but feel conflicted.
>I appreciate all the feedback this thread has generated so far!

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