Sometimes a principal causes a third person to believe that another person is the principal's agent, and the third person acts to their own detriment in reasonable reliance on that belief. When this occurs, the principal is "estopped to deny" (prevented from denying) the agency relationship. Which of these scenarios illustrate an agency by estoppel? Which on of these two is correct. Monica is a realtor and wants to sign a contract with Lewis to sell his condo. Lewis allows Monica to hold an open house even though he has not hired Monica as his realtor. Richard then gives Monica a check for a deposit on Lewis's condo. Monica takes the check. Lewis then hires another realtor. Because of the delay Richard experiences by giving his check to Monica and not the realtor Lewis hires, the condo is sold before Richard can submit a valid offer. Madeline, an actor, hires Nathan to negotiate with movie studios for her regarding film roles. Nathan is at a party one night and is approached by Todd, who asks if Madeline will star in a film he's going to direct. Nathan negotiates a fee for Madeline's role with Todd, which Madeline does not approve