Do I have to have the original invitation letter for visiting relatives in Canada?

No, you can scan it with a computer signature.

Supplementary materials for visiting relatives and friends package

1. Canadian inviter's relationship certificate, such as copy of birth certificate, copy of marriage certificate, copy of correspondence certificate, etc.

2. An invitation letter stating the purpose and duration of the visit.

3. List of persons at the inviter's residence

4. Photocopy of the inviter's citizenship or immigration identity certificate (copy of the front and back of the permanent resident card). Study permit/work permit)

5. The income and financial proof of the inviter must come from independent third-party documents in Canada, which are reliable and easy to verify.

6. If the inviter goes to school in Canada, try to provide the invitation letter issued by the school.