Is there a pending action in court for either child support or child custody? If so, you can request to have paternity established. With a court order to have paternity established (DNA test) the cost will be the lesser of the two. I cannot say for sure that the cost is $30 but it will definitely not be $550. You will be responsible for the cost of the test.
This information provided is general in nature and does not create an attorney client privilege. Please consult with an attorney to get a more detailed and specific answer to your legal matter.
Cost of testing can vary significantly depending on if you are getting a "chain of custody" paternity test (i.e. one that can be used at trial) and just a run of the mill paternity test that many courts will not accept because they cannot verify that the results have not been tampered with. DHHS will usually subsidize or cover the cost of paternity testing if your child support/paternity case is going through their office. However, if the mother has filed a private action against you, then the two of you will likely share the cost of paternity testing.
This attorney is licensed in the State of Texas only and this information does not constitute legal advice. If you are seeking legal advice, please consult with an attorney at your earliest convenience.