Electronic voting machines must provide a printed receipt that shows what the voter selected and submitted for their vote. The voting receipt must be provided to each voter who votes via an electronic voting machine. A duplicate receipt mus also be maintained and store separately from the voting machine.
In addition, electronic voting machine must create a printed record (ledger) of every voters selection.
In the absence of such printed voting receipts, there is no way to verify that a citizen's vote was counted correctly.
This will help reduce election fraud by having a paper audit trail where the printed voting receipts can be matched to the printed voting ledger and electronic record.
Some states like California have such laws in place.