When uncoupling or re-coupling your trailer what must you check first?

When uncoupling or re-coupling your trailer, the first thing you should check is that the area is clear of obstacles and bystanders to ensure safety. Next, inspect the coupling mechanism to ensure it is functioning properly and free of any visible damage or wear. Additionally, confirm that the trailer's brakes and safety features are operational before proceeding. Always follow manufacturer guidelines and safety protocols to ensure a secure connection.