Hi Alexis,
That's really superb, Alexis! I have surely worked with new clients who only pay after confirming the work I did was of quality and that it's a reflection of their requirements but this happened when I was working under a company (to protect both I and the client).
However, this can be tricky when you're dealing with new clients directly and for the first time as chances are some of them may be possible scammers as well. Some may for instance, tell you that you uploaded a low-quality paper and not pay you yet they'll use the paper. You'll end up losing your bucks online.
To protect yourself, let the client pay first but have a refund policy in case they're unsatisfied (and they'd give valid and convincing reasons for their dissatisfaction such as not following instructions or sending a paper with countless grammar or spelling mistakes). Most customers would be ready to comply if they realized they're dealing with a company that's guided by a set of policies and one that has testimonials from previously satisfied clients.
Thanks!