While Canada may have legalized cannabis, there continues to be some resistance to marijuana reform in America. The resulting divide has led to greater tensions between the countries when it comes to travel.

Now, according to an article from Montreal Blog, those who purchase legal cannabis via their credit card could make them subject to more scrutiny when trying to cross over into the US.

As stated in the Patriot Act of 2001, US authorities reserve the right to make extensive background checks on those seeking to enter the country, which can include (but is certainly not limited to) your credit purchase history.

Those who are shown to have purchased cannabis via their credit card are proven to have committed an illegal act in the eyes of the United States government which, as they’ve previously stated, is grounds for getting a lifetime ban from entering America.

This issue is further complicated by the regulations in some areas, like Ontario, which, for the time being, only allows for cannabis to be bought online though VISA or MasterCard. Meaning that, if this is true, then there is no way for Ontario residents to legally buy cannabis in their province without potentially running afoul of US authorities.

Tech giants like Microsoft, Google, and Amazon have said that they would be making a concerted effort to centralize and protect the Canadian data, but, again, the Patriot Act could oblige them to transmit this data regardless.