"Official correspondence" refers to written communication that is formal and authorized by an official or an organization. It usually involves letters, emails, or documents that have legal or professional importance. Full definition
Daily tasks also include handling phone calls, emails, drafting and distributing official correspondence, arranging meetings, scheduling appointments, making travel arrangements, etc.. (bestsampleresume.com)
To give credit where it is due, every one of us can write at least something that we can pass off as official correspondence. (coverlettersandresume.com)
Reviewed and processed official correspondence at the senior division personnel level. (resumemycareer.com)