diff --git a/scripts/rpf-wp-0015-e2-receipt.py b/scripts/rpf-wp-0015-e2-receipt.py
new file mode 100755
index 0000000..cf3594e
--- /dev/null
+++ b/scripts/rpf-wp-0015-e2-receipt.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+"""Write the RPF-WP-0015-T03 synthetic E2 approval receipt for one founder window.
+
+Usage: scripts/rpf-wp-0015-e2-receipt.py OUTPUT.json [--start-in-min N]
+
+The window is 15 minutes and starts now, or N minutes from now. Writing the
+receipt and running the window is the founder GO for that window; D5
+(2fd5849c) authorizes the exercise class only. The owner acknowledgements are
+the round-9 approvals of review contract 014627d6 (audit-core 0d0da0d2,
+rapp-postgres 6d047a08, railiance-platform c4a80a60). They stay valid only
+while the pinned artifacts in interfaces/RAILIANCE-WP-0024-owner-reviews.json
+are unchanged; the script refuses otherwise. The receipt holds no credential
+values. It refuses to overwrite an existing file.
+"""
+import hashlib
+import json
+import sys
+from datetime import datetime, timedelta, timezone
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+pins = json.loads((ROOT / "interfaces/RAILIANCE-WP-0024-owner-reviews.json").read_text())["artifact_sha256"]
+drift = [p for p, h in pins.items() if hashlib.sha256((ROOT / p).read_bytes()).hexdigest() != h]
+if drift:
+    sys.exit("owner-reviewed artifacts changed since contract 014627d6; new owner approvals needed: " + ", ".join(drift))
+if len(sys.argv) < 2:
+    sys.exit(__doc__)
+out = sys.argv[1]
+delay = int(sys.argv[sys.argv.index('--start-in-min') + 1]) if '--start-in-min' in sys.argv else 0
+start = datetime.now(timezone.utc).replace(second=0, microsecond=0) + timedelta(minutes=delay)
+end = start + timedelta(minutes=15)
+tag = start.strftime('%Y%m%dt%H%M')
+z = lambda t: t.strftime('%Y-%m-%dT%H:%M:%SZ')
+receipt = {
+    "procedure": "audit-core-database-lease-recovery",
+    "task_id": "RAILIANCE-WP-0024-T03",
+    "status": "approved",
+    "approval_id": f"rpf-wp-0015-t03-e2-{tag}z-founder-go",
+    "window": {"start": z(start), "end": z(end)},
+    "abort_operator": "founder (platform-root), attended",
+    "owners": {
+        "audit-core": {"acknowledged": True, "message_id": "0d0da0d2-36a1-4ffc-b7bf-7896fad691f6"},
+        "rapp-postgres": {"acknowledged": True, "message_id": "6d047a08-e9c8-4dbf-95b9-dca039791329"},
+        "railiance-platform": {"acknowledged": True, "message_id": "c4a80a60-a415-4f2b-8928-751407473641"},
+    },
+    "synthetic_load": {"contract_id": "RAILIANCE-WP-0024-T02-SYNTHETIC-01",
+                       "driver_revision": "sha256:941ba251f638869626b06e9cbf430c70188c0bdf4715e3eff9c7610366f68662"},
+    "synthetic_sender": {"identity": f"t03-e2-synthetic-sender-{start:%Y%m%d}",
+                         "source": f"t03-e2-synthetic-{start:%Y%m%d}",
+                         "tenant": f"tenant:trial:t03-e2-synthetic-{start:%Y%m%d}",
+                         "expires_at": z(end)},
+}
+with open(out, 'x') as f:
+    json.dump(receipt, f, indent=2); f.write('\n')
+print(json.dumps({"approval_id": receipt["approval_id"], "window": receipt["window"],
+                  "confirm": f"audit-core-synthetic-sender:{receipt['approval_id']}:attended"}))
diff --git a/tests/test_rpf_wp_0015_e2_receipt.py b/tests/test_rpf_wp_0015_e2_receipt.py
new file mode 100644
index 0000000..8dd2f23
--- /dev/null
+++ b/tests/test_rpf_wp_0015_e2_receipt.py
@@ -0,0 +1,35 @@
+"""The E2 receipt generator emits a receipt the sender lane accepts as T03."""
+import importlib.util
+import json
+import subprocess
+import sys
+from datetime import UTC, datetime
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def lane():
+    sys.path.insert(0, str(ROOT / "scripts"))
+    spec = importlib.util.spec_from_file_location("lane_e2", ROOT / "scripts/audit_core_synthetic_sender_lane.py")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def test_receipt_is_accepted_by_the_lane_as_t03(tmp_path):
+    out = tmp_path / "approval.json"
+    printed = json.loads(subprocess.run([sys.executable, str(ROOT / "scripts/rpf-wp-0015-e2-receipt.py"), str(out)],
+                                        check=True, capture_output=True, text=True).stdout)
+    m = lane()
+    approval, spec = m.load_receipt(out, datetime.now(UTC), require_open_window=True)
+    assert approval["task_id"] == "RAILIANCE-WP-0024-T03"
+    assert printed["confirm"] == m.confirm_token(approval)
+
+
+def test_refuses_to_overwrite(tmp_path):
+    out = tmp_path / "approval.json"
+    out.write_text("{}")
+    result = subprocess.run([sys.executable, str(ROOT / "scripts/rpf-wp-0015-e2-receipt.py"), str(out)],
+                            capture_output=True, text=True)
+    assert result.returncode != 0 and out.read_text() == "{}"
diff --git a/workplans/RPF-WP-0015-audit-core-custody-and-recovery-coordination.md b/workplans/RPF-WP-0015-audit-core-custody-and-recovery-coordination.md
index 4adc132..a952d59 100644
--- a/workplans/RPF-WP-0015-audit-core-custody-and-recovery-coordination.md
+++ b/workplans/RPF-WP-0015-audit-core-custody-and-recovery-coordination.md
@@ -9,7 +9,7 @@ flavor: residual
 owner: codex
 topic_slug: railiance
 created: "2026-08-22"
-updated: "2026-10-14"
+updated: "2026-11-03"
 related:
   - AUDIT-WP-0008
   - WH-ENG-20260822-AUDIT-E2-01
@@ -535,3 +535,18 @@ and warden failed closed with self-revocation. Nothing was projected and audit-c
 untouched. Next: sign out of KeyCape (or use a fresh private window), complete
 password+OTP (aal2), reissue a near E2 receipt and run the launcher once. T03 stays
 `wait` until that E2 evidence exists.
+
+E2 window prepared 2026-11-03. No new owner round is needed. Receipt
+acknowledgements are the owners' approval receipts for the review contract,
+not per-window sign-offs; T02 used the `ea3f53d6` approvals the same way. All
+pinned artifacts in `interfaces/RAILIANCE-WP-0024-owner-reviews.json` still
+match round 9 (contract `014627d6`: audit-core `0d0da0d2`, rapp-postgres
+`6d047a08`, railiance-platform `c4a80a60`). The load driver
+(`audit-core/scripts/t02_synthetic_load_driver.py`) still has revision
+`sha256:941ba251…`. The installed ops-warden contains `6e14300`.
+`scripts/rpf-wp-0015-e2-receipt.py` writes the 15-minute receipt and prints
+the confirm string. It refuses if any pinned artifact has changed, and the
+sender lane accepts its receipt as T03
+(`tests/test_rpf_wp_0015_e2_receipt.py`). The 2026-10-14/15 blocker was the
+KeyCape session at `aal1`. The window needs a fresh password+OTP (`aal2`)
+login, and its start must not fall within 20 minutes of 03:17 UTC.