Those storing money are sure it's fraudulent (10)

I believe the answer is:

treasuries

'those storing money' is the definition.
(a treasury is a store of money)

'are sure it's fraudulent' is the wordplay.
'fraudulent' is an anagram indicator (a fraudulent version of the letters).
'are'+'sure'+'its'='aresureits'
'aresureits' anagrammed gives 'TREASURIES'.

(Another definition for treasuries that I've seen is " Financial authorities".)

I've seen this clue in The Guardian.

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