A plan sponsor, an employer, or a plan administrator might prefer to show as its address an address at which the person wants to receive mail.
It could be bad if EBSA or IRS sends a notice to the address shown on the most recently filed Form 5500 report, the employer or administrator does not get the notice, and is charged with having failed to respond timely to the notice.
I have worked on matters in which the plan’s administrator, as a safety caution, was unwilling to show an address of where the employer or administrator worked.
In one, the Form 5500 reported a lawyer’s office address.
In another, the administrator rented a Post Office box and put that address on the Form 5500.
This is not advice to anyone.