I have went to court with my sons father and was granted full custody of this child and at the time I agreed to have his name changed but the father was ordered to pay for this to be done within 10 days but did not do so... will he still be allowed to doso at any time?

Welcome to the site, austins mommy

Try this link and maybe you'll get better responses:
https://www.askmehelpdesk.com/family-law/