A couple of weeks ago, a client told me that he had been approached by a lesbian couple who were dear friends of his and asked whether he would be interested in helping them have a baby. This fellow would only have to provide the sperm and using the traditional method so no medical professionals would be used.
The client asked whether he would be liable for paying child support under New Mexico law. Here's the answer...
In New Mexico, biological parents are required to provide for their children. Even if the parents never marry or if there was no planning of conception, parents are still required to provide support for their kids. However, the New Mexico Court of Appeals has ruled that in cases where the mother was artificially inseminated by medical professionals and the sperm donating father was merely that, a simple donor, the father will not be required to pay child support.
The situation becomes murkier in cases where the parents did not use professional medical care such as in private agreements between parties such as the one my client was about to enter. In cases like this, the courts look to see whether there has been any development of a parent-child bond, whether the father holds the child out as his own, and various other conditions. Problems can emerge even when everything is written down on paper.
So yes it's possible for sperm donors to pay child; maybe. If you have further questions, please contact an attorney.