Also, be aware that there are restrictions on some records.
For individuals still living: Personal information cannot be released without the written consent of the individual concerned (pdf form).
For individuals deceased less than 20 years: Only limited personal information will be released to an immediate family member (spouse, parent, sibling, child or grandchild) of the individual concerned if proof of relationship and proof of death are provided. Proof of death is not required if the individual died
while serving in the Canadian Armed Forces.
For individuals deceased more than 20 years: Personal information will be released on an individual deceased for more than 20 years if proof of death
is provided. Proof of death is not required if the individual died while serving in the Canadian Armed Forces.
You will need to fill out an application such as that below:
You find this document at: http://www.bac-lac.gc.ca/Generics/atip/Documents/15-249l_EN_Request_for_Military_Service_Files.pdf?fbclid=IwAR0z5_0cJOT5x26QXbNVwLvD1ok06oK4Ph7-JW03ZxOhXzJn_WG9wtS86lU