FlyerTalk Forums - View Single Post - Driving Loaner/Courtesy Car from USA to Canada
Old Jun 19, 2014 | 6:38 am
  #5  
wahooflyer
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I've crossed into Canada many times with a rental car and have never been asked for a rental agreement or any other documentation by CBSA.

Since your service loaner is not exactly a "rental" car I would think the registration and insurance certificate would be sufficient.
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