[CA] RBC won’t issue reference letter for RFP

I’m currently preparing a submission for a software consulting–related RFP, and one of the mandatory requirements is to provide a reference letter from a financial institution.

I bank with Royal Bank of Canada (RBC), but they’ve told me they no longer issue reference letters. Instead, they provided a stamped screenshot showing my account balance from online banking.

Has anyone run into a similar situation?

Do you think a stamped bank balance screenshot would typically be accepted in place of a formal reference letter for an RFP? Or should I push back and try to escalate within the bank for an official letter?

Would really appreciate hearing about others’ experiences or suggestions on how to handle this.