I obviously no tax expert, but common sense tells me that if it comes into your bank account, it must be accounted for. If you receive the total commission, then pay the selling side to the co-op brokerage, that money should be shown in and out. That would mean a 1099 to the brokerage that received the money.
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Broker-Owner Thirteen Years REO Experience
GRI,CRS,CRB,e-Pro
Some days I feel like the bug, other days I feel like the windshield