In general, the parties involved in the micro on-line payments are Customer, Service Provider and Payment processor.
The Micro electronic payment transactions can be explained in the following way.
Step 1: Customer proves his authentication and the payment processor issues micro payments.
Step 2: Customer pays the micro payments to the online service provider and gets the requested goods or services form them.
Step 3: Service provider deposits micro payments received from the customer to the payment processor and gets the money.