Hi Lucas,
Happy to help. There are three possible options for your donors to view a receipt, I’m also attaching the relevant links to our documention for each option:
1. In the email confirmation that is sent to them.
https://givewp.com/documentation/core/settings/emails/
2. After the donor has submitted their donation on the Donation Confirmation page.
https://givewp.com/documentation/core/settings/general-settings/
3. When the user gains access to their account on your site
https://givewp.com/documentation/core/settings/general-settings/access-control/
In addition, we also offer an addon called PDF Receipts that will generate a PDF Receipt of the donation for your donors to download and keep on file.
https://givewp.com/addons/pdf-receipts/
Have a great day!