When you get signed up with Clearent for payment processing, they will assign you a 16 digit Merchant ID, or an MID. You can use this information to get signed up on Clearent's website, and to identify your account if you ever need to call Clearent directly.
Here's how to find your MID:
From the full website (not the iPhone app), click the three blue lines in the upper left and select the Settings tab
Choose the Payments and Products tile
View the Merchant ID number across the top
If you ever have trouble finding this information, just reach out to a Schedulicity Rockstar and we can help!