RM4064 | RO instructions: Renewal claims: vouchers not in sole name of taxpayer
From HM Revenue & Customs · Repayment Claims Manual
Once you have accepted that vouchers show income which belongs to the taxpayer, continue to accept vouchers in the same name(s) from the same source unless
you cannot trace papers for an earlier year when similar vouchers were sent to support a claim
or
you have doubts about the taxpayer’s title to the income.
In these cases make enquiries as you would for a first claim.