Shown are the explanations of the numbered fields of Form 3864: Date (Current date)Check Symbol No.Check Serial No.Check DateCheck AmountPayee Name (taxpayer(s) name as shown on check)Agency/Payee ID No. (taxpayer TIN)Agency Location Code (ALC) (e.g., 20090900)Agency Reference No. (Your employee number)Agency: Type Return Address (Address of submission processing site requesting follow-up.)Part B: Agency Reason for follow-up (Check appropriate box. If Other is used, be specific. Attach any pertinent information.