Welcome United States Postal Service (liteblue.usps.gov) retiree. To access CHECKBOOK's Guide to Health Plans from work or home, you will need a personal UserName and Password. Please complete the short form below, and you will be taken to CHECKBOOK's Guide to Health Plans. You will also be emailed a valid UserName and Password that should be used for future access to CHECKBOOK's Guide at www.guidetohealthplans.org.