A common misconception when it comes to oil and gas trading with Canada is that, for GST/HST purposes, there will never be any obligations on foreign sellers selling on a DAP basis.* This is not true, and there can indeed by GST/HST collection and remittance obligations on US and international sellers, if certain conditions are met.
To understand why these misconceptions exist, one needs a deeper appreciation of the Canadian GST/HST legislation, found in Part IX of the Excise Tax Act(“ETA”), and also to get deep into the mindset of the Canada Revenue Agency (“CRA”), which administers the ETA and enforces GST/HST compliance.