Man enters US without passport Mr Reisch said the officer made an exception. Canadians began needing more than a driver's licence for identification for US land border crossings in 2009. US Customs and Border Protection says it only accepts a passport, an enhanced driver's licence or a Nexus pass from Canadian citizens entering at land crossings. The list doesn't mention facsimiles, like scans and photocopies. A spokesman for the department did not immediately respond to questions on whether scanned passports are also commonly accepted at US points of entry. Mr Reisch, 33, said he took a scanned photo of his passport years ago in case it was over lost or stolen while travelling. He said he also successfully used the passport on his iPad to get through Canadian Customs on the way home later that day. He said he doubts he'd get away with it again and will bring his passport next time. But he hopes border officials will eventually make digital identification an official form of travel document. He noted that many airlines now accept digital boarding passes stored on smartphones. "I see the future as 100 percent being able to cross with your identity on a digital device - it's just a matter of time," he said.