In Management → Settings → Payments, connect the school's Stripe account for card payments and configure the methods the school will offer. Check the connection before creating a card-paid offer. If an offline method is enabled, make its instructions clear and settle a line only when money has actually arrived.
The Closing, Offers & Payments guides cover the buyer journey and payment tracking. Payment setup and Stripe connection are school screens; the public Offer payments API only provides existing instalment controls.