I just did my OCI application at BLS Toronto. Here the process:
Step 1:
Fill in the OCI application here:
https://ociservices.gov.in/
Fill both part A and B. You will need 51mm*51mm size digital photograph with a light colored background and digital signatures.
Note - Fill the application in BLOCK letters
* For photograph , you will also need 1 hard copy of the same photograph to be submitted with the application.
After submitting the application form, print it.
Step 2:
Download the checklist from here:
https://blsindia-canada.com/CanadaVisaCCT/Toronto-OCI-Checklist-Rev-11-9-March-31-21.pdf
Step 3:
Collect the copy of below documents:
1. Canadian Passport (first page)
2. Last held Indian Passport (first and last page)
3. Surrender certificate (If you have already surrendered the Indian passport. If you are doing it now together, don't worry about it)
4. Canadian citizenship certificate
5. COPR/ Landing paper
6. Address proof - Driver's license
7. Marriage certificate
8. Spouse Canadian passport (if he is Canadian)
9. Spouse Indian passport (first and last page)
10. Spouse Landing paper/ COPR
11. Spouse surrender certificate
Note - MAKE SURE TO CARRY ORIGINALS OF ALL THESE DOCUMENTS ALONG WITH YOU WHEN YOU GO TO THE BLS CENTER
Self attest all photocopies by writing "This is the true copy of the original" and Sign it along with the date.
Step 4:
Get a Demand draft from the bank for $345 dollars payable to "The Consulate General of India". The rest of fees can be paid using debit card.
Collect the Application form + original documents + self attested photocopies + one physical photograph + demand draft + debit card and visit BLS.