In the app / on the site
Use the bank's published complaint path first: bmo.com/en-ca/main/about-bmo/who-we-are/business-conduct/custome….
Do this once, properly. Screenshot everything — you will attach it to the letter.
The escalation ladder
Branch / Virtual Connect
- 1-877-225-5266Official phone
- bmo.com/en-ca/main/about-bmo/who-we-are/business-conduct/custome…Share concern with branch or call Personal Banking 1-877-225-5266 (credit cards 1-800-263-2263; business 1-877-262-5907).
Customer Resolution Office
- 1-800-372-5111Official phone
- resolutions.canada@bmo.comPublished email
- bmo.com/en-ca/main/about-bmo/who-we-are/business-conduct/custome…Escalate if unresolved in 14 days or sooner on request.
OBSI
- 1-888-451-4519Official phone
- ombudsman@obsi.caPublished email
- obsi.caAfter 56 days without resolution or after final BMO response (within 180 days).
Regulator & ombudsman channels
- Ombudsman for Banking Services and Investments (OBSI) https://www.obsi.ca/ After 56 days without bank response, or after final internal response; typically within 180 days of final response. FCAC: https://www.canada.ca/en/financial-consumer-agency.html
Regulators almost always require proof that you complained to the company first. Attach your ticket numbers.
Public social channels
- No verified public social channel for complaints — we only list channels we can source.
Sources & verification
Every phone number, email and link on this page comes from these official pages, checked on 2026-11-04:
- bmo.com/en-ca/main/about-bmo/who-we-are/business-con…
https://www.bmo.com/en-ca/main/about-bmo/who-we-are/business-conduct/customer-resolution-office/customer-complaint-handling-process/ - obsi.ca
https://www.obsi.ca/