system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What prevents banks and other institutions that hold money electronically from just digitally changing the amount that they have?
gpt
There are audit trails.  Every time money is added to an account, there **must** be a corresponding removal from another account somewhere, and every step has to be recorded.  If government auditors find that there was fraud committed, and money just materialized out of nowhere, someone is going to federal prison for a very long time.