催款函是卖放在规则期限内未收到货款，提示或敦促买方付款的信件。

    写此类催款函请求文字精练、意义分明；同时请求语气诚恳、体恤，彬彬有理。不可随便疑心对方成心拖欠不付，以免伤害对方感情，不利于到达索款的目的，或阻碍以后的业务。关于某些屡催不付，成心逃款的客户，语气则要强硬，措辞坚决。总之索款要把握一个准绳：既要到达索款目的，又要与客户坚持友好关系。

    外贸英语函电：催款函范文适用范例

    （1）subject demanding overdue payment

    dear sirs,

    ac no.8756

    as you are usually very prompt in settling your acs, we wonder whether there is any special reason why we have not received payment of the above ac, already a month overdue.

    we think you may not have received the statement of ac we sent you on 30th august showing the balance of us$ 80,000 you owe. we send you a copy and hope it may have your early attention.

    yours faithfully,

    xxx

    催款函主题：讨取逾期账款

    敬爱的先生：

    第8756号账单

    鉴于贵方总是及时结清项目，而此次逾期一个月仍未收到贵方上述账目的欠款，我们想晓得能否有何特殊缘由。

    我们猜测贵方可能未及时收到我们8月30日发出的80，000美圆欠款的账单。现寄出一份，并希望贵方及早处置。

    你真诚的xxx

    （2）subject urging payment

    dear sirs,

    ac no.8756

    not having received any reply to our e-mail of september 8 requesting settlement of the above ac, we are writing again to remind you that the amount still owing is us$ 80,000. no doubt there is some special reason for delay in payment and we should welcome an explanation and also your remittance,