Depends on what the contract with the broker says. Many of them contain a clause that prevents you, the carrier, from directly soliciting freight from their clients.I've hauled multiple loads from the same shipper getting them from multiple different brokers.
So what's the issue.
Unless there's a previous relation governed by contract. If you've pulled a brokered load from that shipper previously, then you must abide by any contractual agreement you have with the broker. Unless you don't give a ****, and have lotsa money to throw away on attorneys.If the shipper is calling you, I'd say you didn't solicit them.