Prompt payment of the invoice would be appreciated.

见发票即付款，将不胜感激。

They demand prompt payment.

他们要求立即付款。

We would be grateful for prompt payment of your account.

我们应该感谢你迅速的支付。

Your prompt payment of the goods we sent last week will be greatly appreciated.

贵方如果能立刻支付本公司上周发运货物的货款，将不胜感激。

On the day he finished the work, the laborers who worked for him demanded prompt payment.

他完成工作的那天，为他工作的工人们要求立刻付款。