Each and every one of our booked clients receives what we call a general info and logistics email. One of the points we stress the most is that when we pick you up for one of our tours you bring your ORIGINAL passport with you, not a photocopy, no photo id's either.
The explanation is that all of our tours are outside of the city, we drive on intercity and rural roads, and these are patrolled by the road police, la policía de carreteras, a different entity than the city police who are much cooler about photocopies and photo id's.
By law everybody in Colombia must carry identification at all times and must show it to the authorities when requested, and it happens quite often. While on the road it is pretty much a sure thing. Foreigners have to prove their migratory status, in other words that they are in the country legally, and the only way to do this is with their passport, and the road police will be very strict about this and give you a hard time, easily tying the whole group up for an hour or more, possibly ruining the day trip, and this can be prevented by just bringing your passport.
So hey guys, we know it sucks bouncing around in a foreign country with your passport in your pocket, risking loss or theft, but in Colombia them's the breaks, that's how the cookie crumbles, so please bring your passports with you, gracias.