Please login to your Payfunnels account and go into Settings under Account. Now add the display name, upload your company logo, and then click on Save. Below is the screenshot.
The best resolution for the logo is 500 x 500 (height x width).
You can see the display name and logo on the checkout page as shown in the below screenshot:
You can also see the display name and logo on the payment receipt as shown in the below screenshot:
Please email us at support@payfunnels.com if you have any questions.