Can the buyer's salesperson receive commission directly from a private seller?

Imagine a private seller wants to save money by not hiring an agent, but is willing to pay some amount to a potential buyer’s agent to seal the deal.

In the described situation can the buyer’s salesperson receive the commission directly or they should have the seller to write a cheque or something under the brokerage’s name and then get their share from the brokerage after the brokerage has taken their portion?