You can send us a message by registering or logging into your self-service account. You only need to register once and it is easy to do.
You can use your self-service account to send and upload Deduction from Earnings Order schedules, update your details and see or make payments.
The site is secure so all your company and employee information is safe and it is available 24 hours a day, 7 days a week.
If we've given you an Employer Reference Number, make sure you've got it handy so we can direct your enquiry as fast as possible.
Send us a message online if you are logged into your self-service account.
Write to us at:
Child Maintenance Service 22
Mail Handling Site A
If you cannot hear or speak on the phone, use Relay UK: 18001 then call us on our contact number. You can find the number in your welcome pack or at the top of any letter we have sent to you.
If you want to learn more about this site and our services, you can find more information in our Help and FAQs