I agree with everything Debbie said in her response. I made myself an Outlook appointment reminder 2 times a day to check/merge New From Website. I usually have about 15-20 a day (which includes contact form submissions and new WebLink id's). It helps to keep up with it daily, rather than letting it pile up. This will also help eliminate the amount of time you have duplicate records in your system.
If they created a new WebLink ID, we also send out confirmation emails letting them know that their "My Parkview Account" (what we call our weblink id's) is up and running. We also include a FAQ to explain WebLink and Online Giving.
The only time it can be confusing is when you have two people who look like they could be the same, but you don't have enough information to merge them without apprehension. For this, you'll want to come up with your own best practices - whether that is giving them a different status, status comment, or some other sort of tag so you can keep track of the ones that MAY be duplicates, but you don't know inconclusively.
Hope that helps!
Sierra Purvis
Parkview Christian Church
Orland Park, IL