RM4112 | RO instructions: duplicate vouchers sent in
From HM Revenue & Customs · Repayment Claims Manual
Take special care if you discover that the vouchers are duplicates.
When a claimant has sent you duplicate vouchers in support of one claim be even morecareful if you receive duplicate vouchers with later claims.
Always
check whether the tax has been repaid as a result of an earlier claim made with the original vouchers
by your District
or
by another District
refer to your Group Leader if
a claim has already been repaid
or
if you are not sure whether it has been repaid
or
you have any doubts about the claim.