CheckMig allows travelers, nationals and foreigners who intend to enter or leave Colombia, to preload all the information related to their trip. This document serves as Colombia's customs form and arrival card, requiring all visitors to disclose their travel details before arrival.As I understand the check Mig form should be submitted 72 hours before the departure. You must have at least 30 minutes to complete this online application. You need to fill out the Check Mig Colombia Form within 72 hours of boarding your flight. The latest you need the Check-MIG is 1 hour before your flight. I filled out the Check-MIG form to enter Colombia and accidentally put the wrong date of arrival in (today instead of Saturday). Travel itinerary: Departure and arrival dates, airline, flight number, arrival airport, address of stay in Colombia, etc. 1. Entering Colombia: Fill out the form when you are traveling to Colombia. 2. Even if you are eligible for visa-free travel to Colombia, it is still mandatory to fill out the Check MIG form.