I assume the fingerprints are transferred digitally and not via print. That would be the ideal case, rather than have it being mailed.
Accredited fingerprinting companies
Accredited fingerprinting companies are authorized to submit fingerprints to the RCMP's Canadian Criminal Real Time Identification Services (CCRTIS) for searches of the National Repository of Criminal Records. The results of these certified criminal record checks do not include information from other national or local data bases.
In addition to taking fingerprints electronically, several of these companies accept fingerprints that have been taken on paper, convert them to electronic transactions, and submit them directly to CCRTIS for processing. This service is also available to individuals whose fingerprints were taken outside of Canada.
Fingerprinting services: citizenship
They are submitted electronically
My wife is getting hers done this Friday. For some reason, I don't need to do it.
We use this
https://commissionaires-cgl.ca/identification-services/fingerprinting/#1484949763686-c96a5b5a-3e36