I'm not speaking for ARIN but their CEO John Curran told me ARIN has never revoked address resources for any reason other than non-payment or fraud. As long as

I'm not speaking for ARIN but their CEO John Curran told me ARIN has never revoked address resources for any reason other than non-payment or fraud. As long as your original application for the resources was made in good faith and you continued to pay the registration fees, they would not take them away even if you are not using them anymore. This seems logical for functional IPv4 markets where the non-use/non-need is explicit in any resource being offered for sale. The registered organization does still need to be "in business" (registered in good standing with the state corporation commission or equivalent). If the entity is dissolved then the resources automatically revert back to ARIN and it may be difficult or impossible to sell to a third party. It is important to keep ARIN updated with any organization name changes, reorganization, or M&A actions as they happen. Going back 10+ years to update those changes, especially if there are several, can be extremely difficult. In large companies the network folks that manage ARIN resources are often not even be aware of those changes until they interact with ARIN again. That has bitten me several times in my career. In the old days before IPv4 runout they could and would refuse to issue additional IP blocks if you did not show sufficient utilization of your most recent allocation. It was also not unusual for them to reduce the allocation size requested based on how fast you had utilized your most recent block.