Hi Murali,
No there is no such report but instead You can simply append the BUPA search help used during BPs assignment.
I do not know the requirement, but when the end-users will search for BP there will be an option:
Maybe this will satisfy you:
Search help: BUPAI (Partners by Identification Number) search help exit: BUP_SHLP_EXIT_BPARTNER_IDNUM
Search help: BUPAT (Partners according to Tax Details) search help exit: BUP_SHLP_EXIT_BPARTNER_TAX
KR,
Andrzej