Jacob Marley was Scrooges long time business partner.
The sign above the counting house in "A Christmas Carol" reads "Scrooge and Marley." It signifies the business partnership between Ebenezer Scrooge and Jacob Marley, two greedy and miserly characters in the novella.
Scrooge and Marley. Even after Marley died. Quote from the etext: "Scrooge never painted out Old Marley's name. There it stood, years afterwards, above the warehouse door: Scrooge and Marley. The firm was known as Scrooge and Marley."
The Business was sometimes called Scrooge & Scrooge or Scrooge,Scrooge & Marley but it was really called Scrooge & Marley. So Marley was his business partner.
Scrooge was in their counting house (office)
Scrooge and Marley £¢€©℅
When Marley's ghost visited Scrooge he warned him about the ghosts and his behaviour.
after marley scrooge no longer had a partner he flew solo
Marley appeared to Scrooge and warned him about changing his behavior. Marley also told Scrooge he would be visited by three ghosts.
Nothing - he kept it there
Jacob Marley. Marley foretells of 3 others who will help Scrooge
scrooge now is alive and Marley was death for seven year ago.
At the end of the book Scrooge recognises what a good friend Marley had been