I was wondering what the purpose of [setting this hidden variable using the name "action"](https://lab.civicrm.org/extensions/formprotection/-/blob/main/templates/CRM/common/ReCAPTCHA.tpl#L23) is? I tried to experimentally change it to `g-action` which *seemed* to work with some very initial testing. I'm asking because I discovered a problem with a site using a contribution page, with a profile that had the recaptcha checkbox checked, a PCP page attached to it, and the authorize payment processor. The regular contribution page contributions seemed to go through ok. But the PCP contribution failed with the error: > Cannot determine api action for CRM_Contribute_Form_Contribution_Main. CRM_Core_Action "NO DESCRIPTION SET" not recognized. I traced the problem to `CRM/Contribute/Form/ContributionBase.php` - in the `preProcess` function where it calls: `$this->_action = CRM_Utils_Request::retrieve('action', 'String', $this, FALSE, 'add');` At this point, `$this->_action` is set to "validate_recaptcha" which is not what QuickForm is expecting. I perused the code a bit and I'm not even sure that hidden action field is used or necessary?