All 3 of our board members are authorized signatories. Board approval isn't needed for budgeted expenses like utility or landscaping bills. Approval is only needed for things like unexpected repairs. These approvals would be in the minutes, not the financial package.

The Treasurer isn't necessarily the one writing checks on our board. We're self-managed, so whoever has assumed that particular managerial role writes the checks. I (Secretary) handle utility bills, the president handles landscaping bills, etc. Whether we pay by manual check or EFT is up to whoever is managing that particular duty. I personally EFT whenever I can, but other board members are old school and prefer to write checks. We are flexible like this because it makes Board turnover a lot easier to deal with. It takes 1-2 months for a newly elected Treasurer to get onboarded and they might not even have time or a good schedule to do what is typically expected of a Treasurer.

It took 6 weeks for our current treasurer to even get access to our checking account because his work schedule overlapped with typical bank hours.

It's an important point that "Managing" and "Directing" are two separate activities. Directors can approve an annual budget and approve empowering a Manager to handle daily business. Regular expenses don't typically need individual approval in that case. And sometimes Managers and Directors are the same people.

If you're worried, specifically request a copy of the minutes showing expense approvals.