A Jewish tradition that dates from at least the 19th century is to write plus using the symbol ﬩.
The reason for this practice is that it avoids the writing of a symbol + that looks like a Christian cross.
https://www.youtube.com/watch?v=sUJrXNCfUrk

https://i.imgur.com/NkytGv0.jpg

https://0x0.st/HJTQ.jpg