Not sure which WG to post this so I'll try here. Hypothetical case: Suppose there is an ISP that has a /16. They never informed their customers that the assigned PA address space has to be returned once they disconnect from their service (see http://www.ripe.net/ripe/docs/ipv4-policies.html#pa_pi for how it should be done, but wasn't in the past). Now when they see all sorts of announcements of /24s and /22s from their block and they try to recover these lost IPs (contacting the ex-customer or their usptreams to terminate announcement), they are threatened with lawsuits that deletion of the IPs will cause irrepairable harm to the ex-customer and the fact that the LIR never informed the customer of PA recovery therefore entitles them to keep the IPs - forever - or for however long they wish. I don't want this to be a long thread on the pros and cons and what should or shouldn't be done. What I am *specifically* looking for is actual lawsuits and court cases that have taken place in the RIPE sphere in this area and what the outcome of those lawsuits were. Thanks, Hank