Buyer eligibility is the set of criteria a recipient must meet before an internet number registry permits it to receive transferred address space. In an IPv4 transfer, these checks help establish that the buyer is an appropriate recipient under the registry’s policies and administrative requirements. The exact criteria depend on the applicable rules.
Eligibility matters because a transfer changes who is responsible for managing and using a scarce network resource. Registry review can help keep ownership records orderly and reduce uncertainty about who controls an address block. For network operators, confirming eligibility and keeping registry records aligned with routing and operational plans are important parts of a reliable handover. These checks are governance measures, not evidence of a cyberattack.