It is always crucial to double-check whatever it is you are doing. Whether it be setting up a security system, getting a family member to take your photograph, listening to advice from strangers on the internet, or sending a newspaper to print – it is paramount to double-check what it is you are doing as sometimes the most obvious mistakes are the hardest ones to spot!
So, with this idea in mind, here are 12+ people who should have double-checked!