Currently, there is no way to automatically transfer memberships from an old system. Similarly, credit card information saved from an older system also cannot be moved over.
Here is the process on how to manually move your client's memberships:
Make sure you cancel your old memberships in your old system.
Start the client's membership in Mangomint one by one. Note: If it applies to the client's membership, select the toggle "First billing date is after start date" under Advanced Options for Start date. This option is helpful if your the client has already paid for their membership through your old booking system.
To learn how to start a new client membership, go to: Start a new client membership.
If a client's membership has existing services available in your old system, you also need to adjust the available service quantities. To learn how, visit: Adjust the Quantities of Remaining Services on a Client’s Membership