Hi,
The withdrawal form does not require a customer account, it is meant to be usable by guests too. The login screen you see comes from how the menu item is set up, not from the form itself.
Instead of pointing a menu item at the raw URL (index.php?option=com_hikashop&view=withdrawal&layout=form), create the menu item with the dedicated type: in Menus, click New, and for the menu item type pick HikaShop > Withdraw from contract form page. On that page the customer enters their order number and the email they used when ordering, and HikaShop matches them against the order to authenticate, with no login required.
Also check the Access level of that menu item: it must be Public. If it is set to Registered, Joomla itself displays a login form before the page, which would explain what you are seeing.
About editing the form: it is the withdrawal/form view. You can customise it by creating a template override for it (or through Display > Views in HikaShop's configuration), but the standard form already provides the order number, email and product selection needed for the right of withdrawal, so in most cases no change is necessary.
There is a full guide in our documentation under "EU Directive 2023/2673: the withdrawal button" that walks through this setup step by step.
www.hikashop.com/support/documentation/5...thdrawal-button.html