If you have not settled your claim satisfactorily, or it is reasonable to expect further costs directly related to your initial claim, then don't bank the money and return it in 14 days.
If you have come to an agreement about the settlement offered, then you should bank the money. Then the case can be closed for all parties.
By banking the money, you accept it is a final settlement. As it appears to be a bank to bank payment/transfer, if you do not accept the sum as a final payment, you must return/transfer back all of the money within 14 days. You will then need to negotiate the final settlement, which will be paid in full in a single payment at a later date.