From: Rabbi Moshe Sofer
To: Unknown recipient
The Chasam Sofer examines whether a stillborn infant may be buried on Yom Tov, given the Hagahos Maimuniyos's ruling that no Torah-level burial obligation exists for a nefel. He permits burying a safek nefel through non-Jews on Yom Tov.
Source: Shu"t Chasam Sofer OC §144