Is there a workaround if my HP printer continues to display a scan-to-email certificate error despite troubleshooting efforts?

Yes, consider these workarounds: 1) Use a different email provider known to work reliably with your printer. 2) Enable less secure apps or allow access from your printer’s IP in your email provider's settings (though this is less secure). 3) Scan to a network folder instead of directly to email, then manually email the scanned documents. 4) Contact HP support directly for more advanced troubleshooting steps or a possible firmware issue resolution.