Good day! Treat the arrangement as an operational service, not simply a passive rental. InterLIR Global interlir.global/ can help owners lease out unused IPv4 space while keeping the resource, handling matching, contracts, and recurring payouts. You should define acceptable use, tenant verification, abuse response times, routing responsibilities, payment dates, and the reclaim process. Your network team also needs to know who maintains RIR and route objects during the lease. Begin with one smaller prefix and a fixed term, then review incidents, support workload, and payment reliability before making more space available.