To add a cash payment to your member's profile you can either:
1. Create a Custom Charge
Follow this step by step guide to creating a custom charge and select 'Cash' as they payment method: How do I add a custom charge to a member
2. Purchase the service / item and select 'Cash' as the payment method
If the member paid for a membership or a service credits package at your facility and you wish to assign it to them on the dashboard, you can simply follow the steps in this guide and select 'Cash' as the payment method.
Please note that you will not be able to make a cash payment for a recurring (subscription) membership that is setup and connected to stripe. If you wish to offset a payment against this type of membership use the custom charge option instead.