22In such circumstances, the burden of the charge levied but not due has been borne not by the taxable person, but by the purchaser to whom the cost has been passed on. Accordingly, to repay the taxable person the amount of the charge already collected from the purchaser would be tantamount to paying him twice over, which may be described as unjust enrichment, whilst in no way remedying the consequences for the purchaser of the illegality of the charge (Joined Cases C-192/95 to C-218/95 Comateb and Others [1997] ECR I-165, paragraph 22, and Lady & Kid and Others, paragraph 19).
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