Yeah, I've had people not pay for my services. Even worse they went on to pay others after me, I was not pleased. I merely withheld what they wanted for not paying me.
I can't remember at all. I have a policy of pay before service or at least 50 per cent of my funds. So, once I am doing any job for you, we won't have any issues at all.
I have not had an issue where I have not been paid for art or graphics I have created for someone but when I was heavily in the video game content creation world, I noticed a lot of artists who are hired for graphics such as emotes or even logos used to go without being paid for their work and that was always a shame to see as their work was always amazing.
I trusted a family member once who kept promising me I'd get paid. I had designed something for a company he worked for and I asked for 6 months for payment and all I heard was promises. Since then, I learned that contracts are necessary, even for family and friends.
I had such an experience last two years and it wasn't funny. Since then, I can't work for you without you paying 70% of the work or I won't do the work for you.