In reg 100 it says:
(3)In paragraph (2), "overpayment which arose in consequence of an official error" means an overpayment caused by a mistake made whether in the form of an act or omission by—
(a)the relevant authority;
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….
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where the claimant, a person acting on his behalf or any other person to whom the payment is made, did not cause or materially contribute to that mistake, act or omission.
Is it not the case that the claimant materially contributed therfore this OP is not official error?
