Following steps will give you an idea for Correspondence configuration for example for Issuing balance confirmation to Vendors/Customers :
T.Code for Balance Confirmation of Vendors : F.18 and for Vendors F.17.
Before that you have to make some configurations for assigning the
relative Correspondence Form to the Report.
In Financial Accounting - A/R & A/P - Vendor Accounts - Line Items - Correspondence -
Make and change settings for correspondence
Use can use Correspondence type SAP10
Report Program SAP130K for Vendors & SAP130D for Customers
In Assign program for Correspondence Type Copy SAP10 to assign to
your Company Code.
Define Form names for correspondence Print - Click Copy as by choosing SAP130K for Vendors and Assign your Company Code and save. Similarly copy SAP130D for Customers
Next you have to Define Sender details. Again Copy SAP130K and SAP130D and assign your
Company Code and Save.
Now use the T.Codes F.18 and input the Vendor No. Company Code; Give a Reconciliation Key date may be upto last working day of the previous month. Tick Individual Vendors if for only one Vendor
In the output control use F4 to select for Form Set, Sender details, sort variant for Corr - K3 and
Line item sorting P3.. Enter the date of issue
In Print Control by F4 selection give printer Viz.Local
Hope these steps may help you to complete the settings and take printout.
All the best.