diff --git a/src/app/v/[token]/dispatch/_components/dispatch-detail-sections.tsx b/src/app/v/[token]/dispatch/_components/dispatch-detail-sections.tsx
index f400f8f1..0712f6ef 100644
--- a/src/app/v/[token]/dispatch/_components/dispatch-detail-sections.tsx
+++ b/src/app/v/[token]/dispatch/_components/dispatch-detail-sections.tsx
@@ -76,7 +76,7 @@ export function DispatchDetailSections({
           existing={data.signoffs ?? []}
           signoffType="customer"
           nameLabel="Customer name"
-          submissionLocked={data.status === "Refused"}
+          submissionLocked={locked}
           onAdded={() => void refresh()}
         />
       </div>
@@ -89,7 +89,7 @@ export function DispatchDetailSections({
           existing={data.signoffs ?? []}
           signoffType="vendor"
           nameLabel="Your name"
-          submissionLocked={data.status === "Refused"}
+          submissionLocked={locked}
           onAdded={() => void refresh()}
         />
       </div>
diff --git a/src/app/v/[token]/dispatch/_components/refuse-dispatch-dialog.tsx b/src/app/v/[token]/dispatch/_components/refuse-dispatch-dialog.tsx
index f0cb4cf4..89e053f3 100644
--- a/src/app/v/[token]/dispatch/_components/refuse-dispatch-dialog.tsx
+++ b/src/app/v/[token]/dispatch/_components/refuse-dispatch-dialog.tsx
@@ -45,12 +45,6 @@ export function RefuseDispatchDialog({
   const reasonValue = useWatch({ control, name: "reason" }) ?? "";
   const isOverLimit = reasonValue.length > REFUSE_REASON_MAX_LENGTH;
 
-  useEffect(() => {
-    if (!open) {
-      reset({ reason: "" });
-    }
-  }, [open, reset]);
-
   const refuseMutation = useMutation({
     mutationFn: (values: RefuseDispatchValues) => {
       const trimmed = values.reason.trim();
@@ -70,6 +64,15 @@ export function RefuseDispatchDialog({
     },
   });
 
+  const { reset: resetMutation } = refuseMutation;
+
+  useEffect(() => {
+    if (!open) {
+      reset({ reason: "" });
+      resetMutation();
+    }
+  }, [open, reset, resetMutation]);
+
   const submit = handleSubmit((values) => refuseMutation.mutate(values));
   const errorMessage = refuseMutation.error
     ? "Unable to refuse this dispatch. Please try again."
diff --git a/src/app/v/[token]/dispatch/_components/signoff-section.tsx b/src/app/v/[token]/dispatch/_components/signoff-section.tsx
index 58e8eaf4..298e1737 100644
--- a/src/app/v/[token]/dispatch/_components/signoff-section.tsx
+++ b/src/app/v/[token]/dispatch/_components/signoff-section.tsx
@@ -53,7 +53,7 @@ export function SignoffSection({
   }
 
   if (submissionLocked) {
-    return <Text variant="feedback">Signoff is unavailable after this dispatch was refused.</Text>;
+    return <Text variant="feedback">Signoff is unavailable for this dispatch.</Text>;
   }
 
   const submit = async (event: React.FormEvent) => {
diff --git a/src/test/app/v/dispatch-detail-sections.test.tsx b/src/test/app/v/dispatch-detail-sections.test.tsx
new file mode 100644
index 00000000..fad2f8ae
--- /dev/null
+++ b/src/test/app/v/dispatch-detail-sections.test.tsx
@@ -0,0 +1,99 @@
+import { screen } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+import { DispatchDetailSections } from "@/app/v/[token]/dispatch/_components/dispatch-detail-sections";
+import { isVendorPortalLockedStatus } from "@/domain/vendor-portal/lib/status-helpers";
+import type {
+  VendorPortalDispatchDetail,
+  VendorPortalSignoff,
+} from "@/domain/vendor-portal/types/vendor-portal";
+import { renderWithProviders } from "@/test/test-utils";
+
+vi.mock("@/app/v/[token]/dispatch/_components/checklist-section", () => ({
+  ChecklistSection: () => <div data-testid="checklist-mock" />,
+}));
+vi.mock("@/app/v/_components/vendor-portal-documents", () => ({
+  VendorPortalDocuments: () => <div data-testid="documents-mock" />,
+}));
+vi.mock("@/app/v/[token]/dispatch/_components/uplift-requests-section", () => ({
+  UpliftRequestsSection: () => <div data-testid="uplift-mock" />,
+}));
+vi.mock("@/app/v/[token]/dispatch/_components/comments-section", () => ({
+  CommentsSection: () => <div data-testid="comments-mock" />,
+}));
+
+function buildData(
+  overrides: Partial<VendorPortalDispatchDetail> = {},
+): VendorPortalDispatchDetail {
+  return {
+    id: 9,
+    dispatchNumber: "DSP-9",
+    status: "In Progress",
+    nteAmount: 500,
+    checklist: [],
+    comments: [],
+    upliftRequests: [],
+    signoffs: [],
+    documents: [],
+    ...overrides,
+  };
+}
+
+function renderSections({
+  status,
+  signoffs = [],
+}: {
+  status: string;
+  signoffs?: VendorPortalSignoff[];
+}) {
+  const data = buildData({ status, signoffs });
+  const locked = isVendorPortalLockedStatus(status);
+
+  return renderWithProviders(
+    <DispatchDetailSections
+      token="portal-token"
+      dispatchId={9}
+      data={data}
+      locked={locked}
+      refresh={vi.fn()}
+      updateLocal={vi.fn()}
+    />,
+    { withAuth: false },
+  );
+}
+
+describe("DispatchDetailSections signoff locking", () => {
+  it.each(["Verified", "Cancelled", "Refused"])(
+    "locks both customer and vendor signoff forms when status is %s",
+    (status) => {
+      renderSections({ status });
+
+      expect(screen.getAllByText(/Signoff is unavailable for this dispatch/i)).toHaveLength(2);
+      expect(screen.queryAllByRole("button", { name: "Submit Signoff" })).toHaveLength(0);
+    },
+  );
+
+  it.each(["Completed", "In Progress"])(
+    "keeps both signoff forms available when status is %s",
+    (status) => {
+      renderSections({ status });
+
+      expect(screen.getAllByRole("button", { name: "Submit Signoff" })).toHaveLength(2);
+      expect(screen.queryByText(/Signoff is unavailable/i)).not.toBeInTheDocument();
+    },
+  );
+
+  it("keeps an existing signoff visible while the dispatch is locked", () => {
+    const customerSignoff: VendorPortalSignoff = {
+      signoffType: "customer",
+      name: "Ada Lovelace",
+      signatureMethod: "drawn",
+      signedAt: "2024-01-02T03:04:05Z",
+    };
+    renderSections({ status: "Refused", signoffs: [customerSignoff] });
+
+    expect(screen.getByText("Ada Lovelace")).toBeInTheDocument();
+    expect(screen.getByText("drawn")).toBeInTheDocument();
+    expect(screen.getByText(/Signoff is unavailable/i)).toBeInTheDocument();
+    expect(screen.queryAllByRole("button", { name: "Submit Signoff" })).toHaveLength(0);
+  });
+});
diff --git a/src/test/app/v/refuse-dispatch-dialog.test.tsx b/src/test/app/v/refuse-dispatch-dialog.test.tsx
index 5850a511..ef0c9fe7 100644
--- a/src/test/app/v/refuse-dispatch-dialog.test.tsx
+++ b/src/test/app/v/refuse-dispatch-dialog.test.tsx
@@ -169,4 +169,42 @@ describe("RefuseDispatchDialog", () => {
 
     await waitFor(() => expect(onClose).toHaveBeenCalled());
   });
+
+  it("clears the stale error and reason after closing and reopening", async () => {
+    vi.spyOn(vendorPortalApi, "refuse").mockRejectedValueOnce(new Error("nope"));
+    const onClose = vi.fn();
+    const onRefused = vi.fn();
+
+    const portalValue: VendorPortalContextValue = {
+      token: "portal-token",
+      vendor: { companyName: "Gateway Plumbing", vendorId: 101 },
+      status: "ready",
+      error: null,
+    };
+    const renderEl = (open: boolean) => (
+      <VendorPortalContext.Provider value={portalValue}>
+        <RefuseDispatchDialog open={open} dispatchId={9} onClose={onClose} onRefused={onRefused} />
+      </VendorPortalContext.Provider>
+    );
+
+    const { rerender } = renderWithProviders(renderEl(true), { withAuth: false });
+
+    fireEvent.change(screen.getByLabelText(/Reason/i), { target: { value: "too busy" } });
+    await act(async () => {
+      fireEvent.click(screen.getByRole("button", { name: "Refuse dispatch" }));
+    });
+    await waitFor(() => expect(screen.getByRole("alert")).toHaveTextContent(/Unable to refuse/i));
+    expect(screen.getByText(`8/${REFUSE_REASON_MAX_LENGTH}`)).toBeInTheDocument();
+
+    await act(async () => {
+      rerender(renderEl(false));
+    });
+
+    await act(async () => {
+      rerender(renderEl(true));
+    });
+
+    await waitFor(() => expect(screen.queryByRole("alert")).not.toBeInTheDocument());
+    expect(screen.getByText(`0/${REFUSE_REASON_MAX_LENGTH}`)).toBeInTheDocument();
+  });
 });
diff --git a/src/test/app/v/signoff-section.test.tsx b/src/test/app/v/signoff-section.test.tsx
new file mode 100644
index 00000000..b83b0b7e
--- /dev/null
+++ b/src/test/app/v/signoff-section.test.tsx
@@ -0,0 +1,46 @@
+import { render, screen } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+import { SignoffSection } from "@/app/v/[token]/dispatch/_components/signoff-section";
+
+function renderSection(overrides: Partial<React.ComponentProps<typeof SignoffSection>> = {}) {
+  return render(
+    <SignoffSection
+      token="portal-token"
+      dispatchId={9}
+      existing={[]}
+      signoffType="customer"
+      nameLabel="Customer name"
+      onAdded={vi.fn()}
+      {...overrides}
+    />,
+  );
+}
+
+describe("SignoffSection", () => {
+  it("shows status-neutral locked copy when submission is locked", () => {
+    renderSection({ submissionLocked: true });
+
+    expect(screen.getByText(/Signoff is unavailable for this dispatch/i)).toBeInTheDocument();
+    expect(screen.queryByText(/refused/i)).not.toBeInTheDocument();
+    expect(screen.queryByRole("button", { name: "Submit Signoff" })).not.toBeInTheDocument();
+  });
+
+  it("shows the submission form when unlocked", () => {
+    renderSection();
+
+    expect(screen.getByRole("button", { name: "Submit Signoff" })).toBeInTheDocument();
+  });
+
+  it("shows an existing signoff even while locked", () => {
+    renderSection({
+      signoffType: "vendor",
+      nameLabel: "Your name",
+      submissionLocked: true,
+      existing: [{ signoffType: "vendor", name: "Grace Hopper", signatureMethod: "typed" }],
+    });
+
+    expect(screen.getByText("Grace Hopper")).toBeInTheDocument();
+    expect(screen.queryByText(/Signoff is unavailable/i)).not.toBeInTheDocument();
+    expect(screen.queryByRole("button", { name: "Submit Signoff" })).not.toBeInTheDocument();
+  });
+});