Hi Vinod,
Thank you for using Syncfusion products.
We have prepared a sample for illustrating the Nested Mail Merge. Could you please have a look at the sample in the below link and let us know if this helps
http://files.syncfusion.com/support/DocIO.Windows/F88740/F88740Sample.zipIf we have misunderstood your requirement, could you please explain us in detail, so that we can work in depth and try to send a better solution?
Please let us know if you have any questions.
Regards,
Vijay