It has recently come to our attention that you have exceeded your line of credit for Account AC1234XX. To bring your balance down to the approved limit, it is requested that you remit the amount of $[XXX] to [contact & address]. As soon as we receive these funds, we can immediately process your order. However, in the event that you are unable to comply with this request, we suggest that you visit your bank as soon as possible to make other arrangements.