You'd lose your $5. BMO's online banking system is an outgrowth of their telephone banking system, which used 4-6 digit PINs. (Thankfully not the same PINs as used with their bank cards though! Or rather, each card had two PINs, one for use as a card and one for use with telephone/internet banking.)
I'm sure they're all stored in plaintext in an ancient mainframe system, but that's not the reason for the odd requirement.
I'm sure they're all stored in plaintext in an ancient mainframe system, but that's not the reason for the odd requirement.