After online oath did you had to send some signed document to IRCC? If yes, did you send it via email or Canada Post?
Yes, you must send signed oath letter to IRCC no more than 2 days after the oath. The letter is provided in the oath invite email.
You can take a print out sign it (there are two place where you sing, read the instructions carefully). then Scan the document or take a photo of it and email that photo to the same email where the invote came from.
The instruction says that when you send the email keep your subject line as follows: Oath form for [paper file number], [last name].
Also note that papers file number is not same as application number. paper file number is mentioned right below application number on the oath form you are signing.
If you have applied as a group/family. everyone in the group has same paperfile number but different application number.
We sent all our signed oath forms in a single email.
(Do not send any oath form for children below 14 years of age)
I hope this helps.
