Can I submit a certified PDF copy of my diploma for my visa application in Thailand?

You can usually submit a certified copy of your education certificate or diploma for visa and work permit applications, but the consulates typically require the original document for certification, especially if they are certifying a PDF version. In your case, since the original is in Canada, you might want to consider the following options:

1. Canadian Embassy or Consulate: Check if they can assist in certifying a PDF copy of your diploma, or if they have an alternative solution for certifying documents without the original.

2. Digital Certification Services: Some consulates and agencies accept digital certifications that are verified through official university portals. You can inquire whether this option is accepted by the consulate or relevant authorities.

3. Send for Original Certification: If neither of the above options work, you may need someone in Canada to retrieve and certify the original diploma before sending it to you.

It’s best to reach out directly to the consulate or the authority processing your visa for specific guidance.

Why don't you call your Counsulate and ask?