When managing leads it is important to minimise duplicate leads where possible. There are several ways of achieving this;
If a duplicate or similar open lead is created against a customer record there are several things that can be done to alert users;
If you do end up with multiple open leads against the same customer and you do recognize these as duplicates it is possible to merge the leads using either the similar open lead warning, or by using the 'Merge Leads' function. Read more
HERE.