Social media ads
One of the most common ways criminals get people to become money mules is via adverts online and on social media. Mule recruiters advertise ways to get rich quickly by using pictures of luxury lifestyles and bank accounts with high balances. If you reply they might ask you to receive a payment, hold on to it for a while, then pay it on to a different person and keep some of the money for yourself. They might also ask you to hand over all the login details for your account so they can use it temporarily.