In Donald Trump's press conference on 2016-01-11, he and his lawyer pointed to thousands of sheets of paper in manila folders and identified them as only a portion of the documents he is signing to remove himself an an officer of the Trump organization. I guess the best way to frame the question is: are those papers genuinely what's needed to be signed by him?
Trump's business dealings are much more complicated than divesting from 1 company. From Wikipedia
The Trump Organization (formerly Elizabeth Trump & Son) is an American privately owned international conglomerate based in Trump Tower in Midtown Manhattan, New York City. It comprises President-elect Donald Trump's business ventures and investments. From 1971–2017 Trump ran the company as chairman and president. After being elected U.S. president, Trump stated that his two eldest sons - Donald Trump Jr., and Eric Trump (longtime company executive vice presidents) - would take over management of the company as part of a controlling trust.
The Trump Organization has interests in real estate development, investing, brokerage, sales and marketing, and property management. The company owns, operates, invests, and develops residential real estate, hotels, resorts, residential towers, and golf courses in different countries, as well as owning several hundred thousand square feet (several hectares) of prime Manhattan real estate. It lists involvement in 515 subsidiaries and entities with 264 of them bearing Trump's name and another 54 including his initials.
That's a little less than 2 pages per legal entity, assuming 1000 pages. In all likelihood it's more.