It is no problem to figure out the inflow and outflow of funds. 1' s unit loan is returned to you, or the unit has a large reserve fund, or a small vault, or it is lent to you privately. The former requires the bank to report the loss, while the latter two units are illegal. If all the transfers are made by the bank, you can prove your innocence with the bank journal. If it is cash, you need a third party to provide you with evidence.