Every port has many freight forwarders and agencies with good connections to customs brokers. We recommend contacting more than one broker or agent to compare the information and quotes provided.
In the cases of non-coastal ports like Asunción (Paraguay), the routes will have a stop-off seaside port (e.g.: Montevideo or Buenos Aires). In this case, your customs broker must be informed of the customs requirements at this port. The stop-off ports are shown in our website during the booking process.
We always recommend you search for the customs broker and requirements on Google.