The knowledge standard at the heart of Article 54 bis of the UAE VAT Law — deduction refused where the taxable person knew, refusable where it should have known, of a supply's connection to Tax Evasion — did not appear from nowhere. It is the standard mature VAT systems have applied and refined for twenty years. That history is a gift to UAE businesses preparing for FTA Decision No. 13 of 2026, because it answers, in detail, the question the text alone cannot: what actually persuades a reviewer that a buyer neither knew nor could have known?
The Founding Principle: Kittel (2006)
In Kittel and Recolta Recycling, the Court of Justice of the European Union established both halves of the modern position. A taxable person who knew or should have known that its purchase formed part of a transaction connected with VAT fraud can be refused the deduction. But — the protective half — traders who take every precaution that can reasonably be required of them to ensure their transactions are not connected with fraud must be able to rely on the legality of those transactions without risking their right to deduct.
Later CJEU authority reinforced the balance: strict liability would go beyond what is necessary; the burden of establishing knowledge sits with the authority on objective evidence; and a taxpayer cannot be required to conduct checks that are, in principle, the administration's own to perform. The standard rises where indicia of irregularity are present — and stays proportionate where they are not.
The UK Refinement: Mobilx (2010)
The UK Court of Appeal's decision in Mobilx gave the test its sharpest working formulation: a trader loses the deduction where it should have known that the only reasonable explanation for the circumstances of its transaction was a connection to fraudulent evasion. Three further points from the judgment carry directly into UAE practice.
First, the ultimate question is not whether due diligence was performed, but what the circumstances would have told a reasonable trader — diligence is evidence toward that question, not immunity from it. Second, the burden of proving the trader's state of knowledge rests on the authority. Third — and this is the sentence to put in front of every procurement team — even a trader who has asked appropriate questions is not entitled to ignore circumstances whose only reasonable explanation is fraud. Subsequent UK authority added that the circumstances must be assessed cumulatively, standing back, rather than explained away factor by factor.
What Two Decades of Litigation Say a Good File Contains
Across hundreds of contested cases, a consistent picture has emerged of what persuades tribunals. Contemporaneous records — created at the time of the transaction, not assembled after the challenge. Questions actually asked and answers actually considered — evidence of engagement, not of form-completion. A documented response to anything unusual — the price that seemed low, the delivery arrangement that seemed odd, recorded together with what was done about it. And payment conduct consistent with an ordinary commercial relationship — settlement to the supplier, through banking channels, without unexplained third parties.
Read that list against Decision 13 and the alignment is striking: the prescribed measures map closely onto what twenty years of case law says diligent buyers do. A UAE file built to the litigated standard satisfies the prescribed measures almost by construction — and, more importantly, it answers the substantive question that survives even full compliance: whether the circumstances, honestly read, pointed the other way.
The Two Lessons for UAE Buyers
Forms are the floor, attention is the standard. The most consistent losing pattern in the case law is the trader with a complete due diligence folder who transacted through circumstances no reasonable buyer would have accepted. The completed procedure did not save them, because the question was never about the procedure.
The evidence protects the honest. The equally consistent winning pattern is the buyer who noticed, asked, recorded, and acted commercially throughout. The UAE framework — prescribed measures plus the Article 51 allocation of the evasion burden to the Authority — gives exactly that buyer a clear route to protecting its deduction. The route runs through the quality of the file.
How Contiqa Can Help
Contiqa Systems designs verification programmes and defence files to the standard this jurisprudence has defined — measures performed at the right moments, judgement kept in the loop, and evidence captured so that the buyer who genuinely looked can prove it years later. Contact Contiqa Systems to build your file to the litigated standard, not the minimum one.
Track how UAE businesses are responding to this Decision as it takes effect — visit the Decision 13 Tracker on this site.
This article is general commentary on published legislation and case law (working from the unofficial English translation of UAE instruments; case law descriptions paraphrased) and does not constitute tax or legal advice. Obtain advice on your specific circumstances before acting.