Hello,
I am a webdesigner. For many of the websites I build for my clients, I set up a ReCaptcha for the website forms. In 2019, this turned into a "paid" service, for which I get an invoice for €0,00 every month, as the number of clicks stays well below the number from which actual payments are incurred.

In most cases, I set this up with a gmail account of my client, and added my own Google account so I could manage the ReCaptcha for them if necessary. Bottom line: about 30 different recaptchas in my account.

To my dismay, this month I received an invoice for an actual payment. I checked on the site, but the setup is so unbelievable unclear for these Google tools, I cannot make out which sites incurred this traffic, and why it would be billed to me, instead of the the client's Google account.

Can someone explain to me please which account(s) is/are billed on incurring costs with a recaptcha? I hope I selected the proper Cloud Form, but it was unclear to me which one I should use.

Thank you so much for your help!