Debit note or Credit note

Hi all,

Pl see below things that happened,

1st instance : My user made an invoice to customer for $250 instead of $1000 .

2nd instance : He then realized the mistake, and me create a credit note of $1000 instead of $250 (means he again made mistake while reversing).

3rd instance : Then He made a correct Invoice with correct value of $1000.

Now my question is how should I adjust these $750 against that customer.?

Pl suggest me a good solution.

thanks in advance.

Post another Invoice for $750, then the total invoiced will be $1000. Though if you want to supply the customer with one invoice showing $1000, Credit $250 and then Invoice $1000.