Late Payment Mortgage - If you have gone 30 days late on your mortgage your lender will report the late to the credit bureaus. A 30 day late will also make impossible to refinance with a conforming mortgage loan program. If you think you are going to be late the best thing you can do is contact your mortgage holder, they will generally work out a payment plan with you.
Make sure your late payments don't exceed 60 days or worse, 90 days. These dramatically have a negative impact on your creditworthiness and effect the interest rate that banks will offer you for credit.
++