PNG images

Aside from the potential transparency or cutout issues, there are many reasons why the photos may have been rejected.  For the best advice from us,  post a few of the images that were rejected and include the headers of the rejection reasons Adobe listed 🙂

Create images on a transparent background layer to start.  It's much easier than making precise selections & subtracting backgrounds later.

If you can post one or two of your rejected images, we might be able to see where the issues are and why they are not being accepted. There are some online programs available that will supposedly remove background, but I've yet to see one that actually worked well enough for professional purposes. It really requres Photoshop, the Pen tool, and a lot of patience.

The process to remove the background in Photoshop is fairly simple, but sometimes, depending on the complexity if the image you need to refine the edges.

https://www.adobe.com/products/photoshop/transparent-background.html#:~:text=In%20the%20Properties%20panel%2C%20click,file%20to%20retain%20the%20transparency.