diff --git a/addons/laundry_management/static/src/js/payment_screen_patch.js b/addons/laundry_management/static/src/js/payment_screen_patch.js
new file mode 100644
index 0000000..02f1600
--- /dev/null
+++ b/addons/laundry_management/static/src/js/payment_screen_patch.js
@@ -0,0 +1,166 @@
+/** @odoo-module
+ *
+ * PaymentScreen patch — minimal laundry behaviors:
+ *   1. Settlement orders: hide pay-later methods, custom validateOrder
+ *      that calls settle_laundry_dues_rpc and bypasses normal sync.
+ *   2. Legacy laundry orders: trigger order-type popup at payment time
+ *      (NOT on add-line). Block payment if type is required and missing.
+ *
+ * STRICT CONTRACT:
+ *   - Does NOT touch order.lines, pricing, taxes
+ *   - Does NOT override PosOrder.setup
+ *   - Selections stored as primitives only (handled in pos_store_patch.js)
+ *   - For non-laundry orders, super.validateOrder runs unchanged.
+ */
+import { patch } from "@web/core/utils/patch";
+import { _t } from "@web/core/l10n/translation";
+import { PaymentScreen } from "@point_of_sale/app/screens/payment_screen/payment_screen";
+import { AlertDialog } from "@web/core/confirmation_dialog/confirmation_dialog";
+import { LaundrySettlementReceipt } from "@laundry_management/js/settlement_receipt";
+
+function isSettlementOrder(order) {
+    return (
+        order &&
+        order.lines &&
+        order.lines.some(
+            (line) => line.product_id?.product_tmpl_id?.is_laundry_settlement
+        )
+    );
+}
+
+patch(PaymentScreen.prototype, {
+    setup() {
+        super.setup(...arguments);
+        // For settlement orders, hide Customer Account / pay-later methods.
+        if (isSettlementOrder(this.currentOrder)) {
+            this.payment_methods_from_config =
+                this.payment_methods_from_config.filter(
+                    (pm) => !pm.split_transactions
+                );
+        }
+    },
+
+    /**
+     * Pre-payment gate for the legacy laundry order-type flow.
+     *   - true  → continue with payment
+     *   - false → block payment
+     *
+     * Skipped for: feature disabled, settlement orders, non-laundry orders,
+     * and orders that already have a type. If required + missing, opens the
+     * popup; blocks if the user closes/cancels.
+     */
+    async beforePaymentFlow(order) {
+        const pos = this.pos;
+        const config = pos.config;
+        if (!order || !config?.enable_laundry_order_type) {
+            return true;
+        }
+        if (isSettlementOrder(order)) {
+            return true;
+        }
+        if (!pos.orderHasLaundryServiceLine(order)) {
+            return true;
+        }
+        if (order.laundry_order_type_id) {
+            return true;
+        }
+        await pos.runLaundryOrderTypeFlow(order);
+        if (config.require_laundry_order_type && !order.laundry_order_type_id) {
+            pos.notification.add(
+                _t("Order type is required to proceed to payment."),
+                { type: "warning" }
+            );
+            return false;
+        }
+        return true;
+    },
+
+    async validateOrder(isForceValidate) {
+        const order = this.currentOrder;
+
+        // ── Settlement validation — bypass normal POS sync ──
+        if (isSettlementOrder(order)) {
+            return this._validateSettlementOrder(order);
+        }
+
+        // ── Legacy laundry order-type gate ──
+        const allowed = await this.beforePaymentFlow(order);
+        if (!allowed) {
+            return false;
+        }
+
+        return super.validateOrder(isForceValidate);
+    },
+
+    async _validateSettlementOrder(order) {
+        const paymentLines = order.payment_ids
+            .filter((pl) => pl.getAmount() > 0)
+            .map((pl) => ({
+                pos_payment_method_id: pl.payment_method_id.id,
+                amount: pl.getAmount(),
+            }));
+
+        if (paymentLines.length === 0) {
+            this.notification.add(
+                _t("Please add at least one payment."),
+                { type: "warning" }
+            );
+            return false;
+        }
+
+        const partnerId = order.partner_id?.id;
+        if (!partnerId) {
+            this.notification.add(_t("No customer selected."), {
+                type: "danger",
+            });
+            return false;
+        }
+
+        const sessionId = this.pos.session?.id || null;
+
+        let response;
+        try {
+            this.ui.block();
+            response = await this.pos.data.call(
+                "res.partner",
+                "settle_laundry_dues_rpc",
+                [partnerId, paymentLines, sessionId]
+            );
+        } catch (err) {
+            this.dialog.add(AlertDialog, {
+                title: _t("Settlement Failed"),
+                body:
+                    err?.data?.message ||
+                    err?.message ||
+                    _t("Unknown error."),
+            });
+            return false;
+        } finally {
+            this.ui.unblock();
+        }
+
+        if (
+            order.payment_ids.some(
+                (pl) => pl.payment_method_id.is_cash_count && pl.getAmount() > 0
+            )
+        ) {
+            this.pos.hardwareProxy.openCashbox();
+        }
+
+        this.dialog.add(LaundrySettlementReceipt, {
+            partnerName: order.partner_id.name,
+            settledTotal: response.settled_total || 0,
+            remainingDue: response.remaining_due || 0,
+            payments: response.payments || [],
+            settledOrders: response.settled_orders || [],
+        });
+
+        this.pos._lastSettlementMethodId =
+            paymentLines[0]?.pos_payment_method_id || null;
+
+        this.pos.removeOrder(order, false);
+        this.pos.addNewOrder();
+        this.pos.navigate("ProductScreen");
+        return true;
+    },
+});