In a January 29, 2016 Tax Court of Canada case (SNF S.E.C. vs. H.M.Q., 2013-1207(GST)G), CRA had denied over $500,000 of ITCs, and assessed penalties and interest, in respect of GST and QST paid to welve suppliers. Unknown to the taxpayer, the suppliers did not remit the tax. oatax.quora.com/GST-HST-INPUT-TAX-CREDITS-ITCs-DUE-DILIGENCE