Say goodbye to Mickey Mouse and Donald Duck. Well, that’s if you’re an investor. Walt Disney Co. will no longer issue printed copies of its stock certificate, which has become a collector’s item for featuring depictions of some of its popular animated characters. The board of the Burbank entertainment and media conglomerate voted on Oct. 4 to make the change effective Oct. 16. After that date stock will be issued in an electronic form. The company disclosed the change in an Oct. 8 filing with the Securities and Exchange Commission. “Like hundreds of other companies, Disney will no longer be issuing paper stock certificates in an effort to create a more secure and efficient system,” the company said, in a statement. Disney stock featured a black-and-white photo of company founder Walt Disney surrounded by animated characters, including Winnie the Pooh, Mickey Mouse, Dumbo, Bambi and Pinocchio. Shares closed up $1.99, or 3.13 percent, to $65.58 on the New York Stock Exchange.