This is probably a letter of confirmation sent to you by audit institutions such as firms when auditing the other company. Because the audit deadline of the other company is June 30th, 20 14, the deadline for confirmation is June 30th, 20 14. If the correspondence between you has been settled before this date, you can explain in the confirmation letter that your book amount is inconsistent with the confirmation letter and yours is zero.
Because it may have been settled before June 30th, but the other party didn't keep an account in time, their balance was still 75,000, or it may have been kept by the other party after June 30th, but the balance on the audit deadline was still 75,000, so the amount on the confirmation letter was also 75,000.
Never mind, just tell me your amount.