Can my stepfather get me a green card if him & my mom have been together for over 15 years but did not get married through court till after I was 19 ?

The law only allows a step relationship to be formed where the marriage was entered into prior to the child's turning the age of 18. In your case, the answer may hinge upon the law of the jurisdiction in which your mother and stepfather were married. If they were married in a country that recognizes church ceremonies as legally binding under law, then the step relationship would be formed upon the church wedding and your stepfather would be able to petition for your green card. Otherwise you would not be able to do so. Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.