Can any one let me know …if there is any chance of data duplication by any webMethods notification …if there is a chance how can we identity it and how to avoid it

@Sandeep,

You can avoid duplicate publish but not data duplicates. If you are looking for data duplicates, you need to come up with custom logic. [Although this is very rare case, as tables have primary or references keys].

Ref: http://techcommunity.softwareag.com/ecosystem/documentation/webmethods/adapters_estandards/Adapters/JDBC/JDBC_6-5/6-5_JDBC_Adapter_Install_and_Users_Guide.pdf
Page 188

Content:
Adapter notifications can use the Exactly Once notification feature. This feature ensures that notification data will not be duplicated even if a failure occurs during processing. This is achieved by assigning unique IDs for each publishable document. After a processing failure, Integration Server checks for duplicate records in storage and ignores any duplicate IDs.

HTH.

Thanks,
Rankesh