Ask for further details from the strata manager e.g. number of hours and rate per hour, copies of receipts or further details for phone calls, printing and postage costs. This could easily be provided by the secretary and demonstrates transparency. Usually payments are agreed in advance by owners at the AGM for designated member/s of the Executive Committee for phone calls and printing costs. Some owners corporations support reimbursement for costs incurred particularly for those volunteers on the Executive Committees on fixed incomes and are agreed up front and in advance.