This problem occurs if the Credit limit type is set to Balance+All and the customer is marked with Mandatory credit limit=Yes. If a sales order is created in HQ and partially prepaid in POS, there is a credit limit error, and the transaction is not possible to complete. It should be possible to fulfil a partial prepayment eve though the customer credit limit is exceeded. Prepayment is used to secure a payment of capital goods and is used because the customer has no credit or have exceeded the limit.