Before the start of work, the client writes his wishes for the text. He does, it's important. Then I clarify the important points for my work. Then we agree on deadlines and payment. I complete the work on time, send it to the client to see it, and make adjustments if necessary. When the project is completed, the client gets what he wanted (high-quality text), and I get paid. I usually work long term (several projects) with my clients.