No.  The buyer and seller may negotiate additional days after the closing, at a daily rental rate, during which the seller is allowed to remain in the home.  This is called renting back the home.  The buyer’s agent will make sure that the necessary legal documents are signed at closing to protect the buyer.  These documents will include the term the seller is allowed to stay in the home, the rent owed and describe the maintenance requirements and condition the home must be in when transferred to the buyer.