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.
These things may happen due to natural reasons; this is the principle, because it may happen that someone may take some of this money without the owner realizing it, whether it is a relative of the owner of the money who took the money or someone else.
However, if you predominantly think that there is something unnatural, then this may be due to the jinn; this is possible and it is something confirmed. Indeed, this happened during the era of the Prophet when the devil tried to steal from the money of the charity as narrated by Abu Hurayrah . [Al-Bukhari]
Finally, we issued Fatwa 81497 mentioning some advices for whoever thinks that there are some unnatural things in his house which happen due to the jinn, so please refer to it.