The person who notified you, from the bank (6)

I believe the answer is:

teller

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'the person' is the definition.
(teller is a kind of person)

I don't understand the remainder of the clue.

(Other definitions for teller that I've seen before include "Counter of votes or a bank employee" , "Bank official or reporter" , "one gives relation" , "one reckons" , "Narrator and bank clerk" .)

I've seen this clue in the Evening Standard.

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