Can a see spouse sell the house,his name is the only one on the mortgage. We have .been married for almost 37 years but bought house 3 years ago

I'm not sure what you are asking. On purchasing the house, if it was an inheritence the will, or probate would control, and I'd have to see those documents. On selling the house, you list your question under divorce. If you are divorced the decree will control who owns the house. I'd have to see the decree. You need to provide a lot more information, and let me know exactly what you are seeking.