Ljudevit Ludwig Auer was born on August 18, 1892 in Zabno, today’s Croatia, to parents Emil (Milan) and mother Emilia born Grinhut (Grünhut). He went to school in his hometown, where he finished elementary and then attended high school in Zagreb, Prague and Sremski Karlovci. He enrolled at the Faculty of Law in Zagreb and continued his studies in Vienna, Moscow and Paris. He graduated and received his doctorate in Zagreb. He completed his internship at the office of Juraj Raskaj in Sremski Karlovci, where he also met his wife, Ana Poljak, the sister of Aleksandra Rashkay.
In the period of liberation and unification in the new state, he will join, together with Dr. Juraj Rashkay, to the the Committee of the National Council in Sremski Karlovci. He was the editor-in-chief of the Glasnik Narodnog veca, published in Karlovci and printed in the Serbian Monastery Press.
Dr. Auer had a law firm in Petrinja from 1921 to 1928, and then moved to Sisak and worked there as a Notary Public from 1928 to 1941.
In 1931 he was elected Member of Parliament on behalf of the Yugoslav National party. In the government of Bogoljub Jevtic he was a Ministry of Social Affairs and Physical culture (December 1934 – June 1935), and in the government of Milan Stojadinović he served as a Minister of Justice.