OHIP POA -- Is the first ever bank mail enough?

[Jane2019]

Has anyone used the mail from the bank -- essentially the first mail when they send you your card -- as POA for SIN or OHIP?
SIN POA requirement seems a bit more relaxed than OHIP:

-- SIN --
"a letter or document from a financial institution (bank statement, credit card statement, mortgage contract or statement, etc.)"
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-- OHIP --
"
monthly mailed bank account statements for savings or chequing accounts
* does not include receipts, bank books, letters or automated teller receipts
"
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It's weird that bank 'letters' are not accepted for OHIP - whatever they might mean by 'letters'..