I think the problem is that poor people transferring money typically don't have such documentation on them. (As was the case in the situations I just googled, which are easy to find. For example: https://www.vox.com/2015/6/17/8792623/civil-forfeiture-charl...) Most such seizures are also tied up with "suspicion" of drug trafficking, which means it's no longer a matter of proving the money is yours. You must now prove the money is not involved in your supposed drug trafficking.