“20 It should be recalled that Article 90(1) of the VAT Directive provides for the reduction of the taxable amount in the event of cancellation, refusal, total or partial non-payment, or where the price is reduced after the supply takes place. 21 In that regard, the Court has consistently held that provisions of EU law must be interpreted and applied uniformly in the light of the versions existing in all the languages of the European Union. Where there is divergence between the various language versions of an EU legislative text, the provision in question must be interpreted by reference to the general scheme and the purpose of the rules of which it forms part (judgment of17 May 2017 , ERGO Poist’ovňa , C‑48/16, EU:C:2017:377 , paragraph 37). 22 With regard to the terms ‘cancellation’ and ‘refusal’, it should be noted that most language versions of that provision, including the German and the French versions, refer to three possible situations, whereas other language versions, such as the English and the Hungarian versions, refer to two situations only. 23 As observed by the European Commission, the intent to include cancellation with retroactive ( ex tunc ) as well as with prospective ( ex nunc ) effect may explain the use in Article 90(1) of the VAT Directive of three terms, inter alia, in the German and the French versions. 24 The terms ‘elállás’ and ‘teljesítés meghiúsulása’ in the Hungarian version of that article do not preclude that interpretation in that they refer, respectively, to the retroactive refusal of an agreement and to a failed transaction. 25 That interpretation of Article 90(1) of the VAT Directive corresponds, in any event, to the general scheme and the purpose of that provision. 26 According to the case-law of the Court, in the situations covered by that provision, Article 90(1) of the VAT Directive requires the Member States to reduce the taxable amount and, consequently, the amount of VAT payable by the taxable person whenever, after a transaction has been concluded, part or all of the consideration has not been received by the taxable person. That provision embodies one of the fundamental principles of the VAT Directive, according to which the taxable amount is the consideration actually received and the corollary of which is that the tax authorities may not collect an amount of VAT exceeding the tax which the taxable person received (see, to that effect, judgment of15 May 2014 , Almos Agrárkülkereskedelmi , C‑337/13, EU:C:2014:328 , paragraph 22).”
“I can see no ground on which a delivery of goods pursuant to a contract which contains a title retention clause and which constitutes a supply in respect of which VAT has become due within the clear terms of the legislation can later be said not to constitute a supply because the goods are repossessed by the vendor.” 58. He submitted that the important proviso in Vinelott J’s conclusion is “ because the goods are repossessed by the vendor ”
“ A return or assessment may have to be adjusted if in the light of later events it transpires to have been incorrect and it may be that an adjustment falls to be made if it transpires that a supply was made under a contract which is later found to be void or which is rectified or rescinded .” 59. The further importance of the contractual arrangements is shown by Société thermale d'Eugénie-les-Bains v Ministère de l'Économie, des Finances et de l'IndustrieCase C-277/05 ;[2008] STC 2470 (“ Société Thermale ”) where the CJEU recognised that contracting parties may wish to provide the cancellation of a supply will not require the supplier to refund all money paid by its customer: “[28] In that regard, it should be noted that the contracting parties are at liberty – subject to the mandatory rules of public policy – to define the terms of their legal relationship, including the consequences of a cancellation or breach of their obligations. Instead of defining their obligations in detail, they may nevertheless refer to the various instruments of civil law .”