Core funding is released in installments rather than as one payment. Ontario states that invoices covering an initial tranche of core funding must be submitted before the next portion is released (the exact tranche amount is set by published program rules; confirm with AccessOAP). Reconciliation is the process of reporting, through an expense form, how the money was actually spent.
Ontario publishes a list of eligible and ineligible expenses. Therapy hours with qualified providers, assessment, consultation and multidisciplinary collaboration are eligible. Materials and equipment generally require a letter of recommendation from a regulated professional.
You must keep original receipts, invoices and proof of payment - including debit, credit card or PayPal statements - for seven years from the date on the invoice or receipt. This is the single most concrete obligation in the whole process, and the one families most often learn about too late.