Hi Kenny,
The only thing we have to remember is on qualifying lead is:
1.) if the company in lead form already exist in our accounts, then no need to check account ,just pick potential customer and remaining contact and opportunity should be selected.
2.) if company and contact person also there in account and contact respectively, then we should only check oppurtuinity.
3.) if no such records found on account and contact with company name and firstname and lastname in lead form, we need to check all the three.
(Mark as answer and vote as helpful)
Thanks,
SASANK K