Hi Naren,
All logging including certificate logging is send to the logging buffer, console or to syslog based on your configuration.
Are you trying to clear/delete the issued identity certificate information stored in the NVRAM ?
Then, you can do a dir nvram:*.cnm and dir nvram:*.crt
Example:
1.cnm
1.crt
2.cnm
2.crt
3.cnm
3.crt
4.cnm
4.crt
Theystart with 1 and then go upwards. Its OK to delete these files , just be careful to delete any other files like with .cer extension.
You can delete using delete nvram:.
If thats not what you are looking for, then please provide more details on what you want to achieve.
Tom