They should know exactly what you're due at all times.

I've been collecting an IBM pension since 1995 and getting statements required by ERISA (the FEDs) outlining the funds put aside, invested, and available for retiree benefits.

The biggest problem is that the monthly amount to me has not changed since it started. Also the medical coverage been morphed to reduce their expenses and is now an HRA (Health Reimbursement Arrangement) with a low limit. They also make a small annual ($450/person) payment to you if you have Medicare coverage.