Doing business with customers for the first time, I don't want customers to have credit.

You should see what kind of business this is. If it is a relatively large business, it is best not to open a credit. There are many euphemisms. For example, you say, "I have a bad turnover of business fees recently." I need you to cooperate with my work and pay the deposit, or you can't bear to see my cash flow is not working, so I think you can help me. " Then he should understand what you mean, but don't sound too bad. Be confident, otherwise people will think that your performance is not good, or you are not short of funds. Also, you can say that your friend needs your support, you are a little short of money and need a sum of money, and you can politely stop him from taking credit. I wonder if it can be used. Let's talk about it when I use it.