He was surrounded by very complex security measures. In a letter in December 2010, he expressed his worries to his third wife Khairiyah, The Telegraph reported.
"I think that I have to leave them," wrote bin Laden, referring to the two Pakistani brothers who sheltered him in Abottabad and served as his link with the rest of the world. "But it will take a few months to arrange another place," he added.
The newly declassified document has revealed.
Bin Laden was planning to live with wife Khairiyah and their son, Hamza. At the time, Khairiyah had found sanctuary in Iran, along with other members of bin Laden's family.
Khairiyah was present at the Abbottabad campus when seal commandos carried out the raid. Bin Laden's son, Hamza, remains at large today.