[citation needed] Willig studied at Yeshivat Kerem B'Yavneh[1] and was present at the Six-Day War in June 1967.

[5] The position at Yeshivat Har Etzion was eventually given to Willig's former Chavruta in Lichtenstein's shiur, Rabbi Ezra Bick.

[8] Willig is the author of a sefer, Am Mordechai, which came out in four volumes (1992 on Brachot, 2005 on Shabbat 2010 on Seder Moed and 2016 on Shulchan Aruch).

[10] The Bet Din read their determination to the litigants, to the Rabbinical Council of Bergen County, and to Lanner's two employers, the Orthodox Union and a synagogue in New Milford, New Jersey.

[10] On February 19, 2003, Willig apologized for reaching what he eventually realized to be incorrect conclusions and for other "mistakes" made during the 1989 Bet Din proceedings.

[10][11] A report prepared in 2000 by a special commission appointed to investigate the Orthodox Union and Willig's Bet Din role in the Lanner case critiqued the failure of taking action and thus allowing Lanner's abusive actions to "continue unchecked for many years.