IEIM8000120 | Individual or Entity, as a business
From HM Revenue & Customs · International Exchange of Information Manual
Both individuals and entities may be RCASPs where they are providing services effectuating exchange transactions as a business for, or on behalf of, customers.
If the individual or entity effectuates exchange transactions on a very infrequent non-commercial basis, they will not meet the definition of an RCASP. Further guidance on what constitutes a business can be found on the Business Income Manual.