Исправьте, пожалуйста, ошибки.
Dear Elena, good morning! Yes, of course, we work with your company already very big period of time and we trust you concerning payment of accounts. However, the management of our company insists on payment of invoices strictly in the term stipulated by the Contract. It is necessary for decrease in growth of receivables. According to information available for me payment term under the Contract - 30 bank days on copies of documents. Documents on July flights were sent 05.08.2012, term of payment of accounts - 17.09.2012. Only for this reason we requested from you the letter of guarantee. Report, please, if I have any erroneous data about term of payments, I will surely find out this question from the management.