Regarding Credit Check

Dear Experts,

I created a new customer his payment tems is in Advance.i created a sales order. sale order is blocked due to customer credit check he is not having credit limit. for that i entered dowpayment. in customer account history he is having sufficient fund.

when i am going to do delivery it is going to block due to credit check. i dont want to relase credit. without relase of credit check how can i process delivery.

with regards,