请帮忙改正,以便更委婉的表达出来,并请翻译一下

2月份即将到期货款对帐单
The statement of account payment due in Feburary
对帐单statement of account

May 31st, 2006(信函中日期要放在前面)

Dear client ****
或
Dear customer ****

According to our statements of account receivables, your company's payment of 20,000 yuan of January will be due at the end of February, please verify it!
Thanks for your cooperation!
** Company
***

亲爱的客户****
按照我公司应收帐款单，贵公司1月份货款20000元，将于2月底到期，请核对! 谢谢您的合作!
**公司
***
* 年*月*日

February bills to be due to the purchase price

Dear clients ****
Hello, according to our receivable accounts bill , your company purchase price 20,000 yuan in January will expire by the end of February, please check!
** Companies ***
..........