How to find payments by invoice numbers?

A participant asks about her / his payment status and for identification sends the invoice number.
What is the fastest way to find a participant by invoice number?

In the list of participants, you can use the search function to look for specific entries.
Please go to:
Overview => User and Participant Management => List of All Registrations for Participation

Enter the invoice number (or any other data) into the text field of the search function (see image).

To enter the payment, in the right-hand column "Action" of the corresponding row of the participant, click on "Payments".
To update other data, click on "Edit Registration".