An ignoramus told me that a hadith says that if you never get married, your funeral is unacceptable. Does hadith exist in any collection? If so, please give the reference and explanation of it.

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.

We have not come across a Hadeeth with this meaning; rather, what is confirmed is that it is an obligation to perform the funeral prayer for every Muslim who dies upon Tawheed [believing in the oneness of Allaah, not associating any partners with Him].

Allaah Knows best.