Can I sue if there is no debit note and only the transfer record?

There are no IOUs, only transfer records can be prosecuted. However, the plaintiff bears the burden of proof to prove that there is a loan relationship between the two parties. The plaintiff only filed a private lending lawsuit based on the transfer voucher of financial institutions, and the defendant argued that the transfer was to repay the previous loans or other debts of both parties, and the defendant should provide evidence to prove his claim. After the defendant provides corresponding evidence to prove his claim, the plaintiff should still bear the burden of proof for the establishment of the loan relationship.