Can I deauthorize ADE on a device I know longer physically have?

I need to deauthorize ADE on several devices. Unfortunately, I know longer physically have the devices, so I can't plug them into the computer via USB and deauthorize them that way. Is there another way to do this? I need to authorize adobe on my ipad to read books via overdrive but it says I have too many devices linked. I deleted the devices via overdrive but overdrive customer support says I have too many ADE authorizations active...