Such seizures should have the same procedural limitations as arrest of an individual does. Individual procedural limitations:
- Police can arrest you and throw you in jail if they have reason to suspect you committed a crime.
- Within a certain number of days of being thrown in jail, they have to either produce concrete charges against you, or let you go
- While the trial is going on, you can apply for bail to get your freedom.
- You can't finally be thrown in prison until you've been convicted by a jury of peers.
You could apply parallel standards in this situation:
- Police / coast guard could seize a ship if they have reason to believe it's smuggled goods
- Within a certain number of days, they have to either produce concrete charges against the owner, or let them have your stuff back.
- While the trial is going on, the owner should be able to apply for "bail" to get their stuff back. A judge can determine if it's worth the risk or not, just as they do for prison cases
- The stuff can't be finally taken away until the owner has been convicted by a jury of peers.
Adding in something like, "All seized goods are distributed to the poor" or something rather than "All seized goods go to the department which seized them" would go a long way towards ending this sort of abuse.