diff --git a/e2e/submarineSwap.spec.ts b/e2e/submarineSwap.spec.ts
index 5c7479c8..0809de10 100644
--- a/e2e/submarineSwap.spec.ts
+++ b/e2e/submarineSwap.spec.ts
@@ -4,6 +4,7 @@ import {
     bitcoinSendToAddress,
     generateBitcoinBlock,
     generateInvoiceLnd,
+    lookupInvoiceLnd,
 } from "./utils";
 
 test.describe("Submarine swap", () => {
@@ -28,7 +29,8 @@ test.describe("Submarine swap", () => {
         await expect(inputSendAmount).toHaveValue(sendAmount);
 
         const invoiceInput = page.locator("textarea[data-testid='invoice']");
-        await invoiceInput.fill(await generateInvoiceLnd(1000000));
+        const invoice = await generateInvoiceLnd(1000000);
+        await invoiceInput.fill(invoice);
         const buttonCreateSwap = page.locator(
             "button[data-testid='create-swap-button']",
         );
@@ -48,7 +50,15 @@ test.describe("Submarine swap", () => {
         await bitcoinSendToAddress(sendAddress, sendAmount);
 
         await generateBitcoinBlock();
-        // TODO: verify amounts
+
+        await page.getByText("Copy preimage").click();
+        const preimage = await page.evaluate(() => {
+            return navigator.clipboard.readText();
+        });
+
+        const lookupRes = await lookupInvoiceLnd(invoice);
+        expect(lookupRes.state).toEqual("SETTLED");
+        expect(lookupRes.r_preimage).toEqual(preimage);
     });
 
     test("Create with LNURL", async ({ page }) => {
diff --git a/e2e/utils.ts b/e2e/utils.ts
index 45d46ab8..4a08a3e2 100644
--- a/e2e/utils.ts
+++ b/e2e/utils.ts
@@ -1,3 +1,4 @@
+import bolt11 from "bolt11";
 import { exec } from "child_process";
 import { promisify } from "util";
 
@@ -60,6 +61,25 @@ export const generateInvoiceLnd = async (amount: number): Promise<string> => {
     ).payment_request as string;
 };
 
+export const lookupInvoiceLnd = async (
+    invoice: string,
+): Promise<{ state: string; r_preimage: string }> => {
+    const decoded = bolt11.decode(invoice);
+    let paymentHash: string | undefined;
+
+    for (const tag of decoded.tags) {
+        switch (tag.tagName) {
+            case "payment_hash":
+                paymentHash = tag.data as string;
+                break;
+        }
+    }
+
+    return JSON.parse(
+        await execCommand(`lncli-sim 1 lookupinvoice ${paymentHash}`),
+    ) as never;
+};
+
 export const getBolt12Offer = async (): Promise<string> => {
     return JSON.parse(await execCommand("lightning-cli-sim 1 offer any ''"))
         .bolt12 as string;
diff --git a/regtest b/regtest
index c6df76dc..27099691 160000
--- a/regtest
+++ b/regtest
@@ -1 +1 @@
-Subproject commit c6df76dcfdeb8b28a2f3114166df8669f87d3657
+Subproject commit 27099691e52acf4bba8993941b4be0afccd63aa9
diff --git a/src/i18n/i18n.ts b/src/i18n/i18n.ts
index 9034788b..f9b51974 100644
--- a/src/i18n/i18n.ts
+++ b/src/i18n/i18n.ts
@@ -219,6 +219,7 @@ const dict = {
         timeout: "Timeout",
         wallet_connect_failed: "Wallet connection failed: {{ error }}",
         ledger_open_app_prompt: "Open Ethereum or RSK app",
+        copy_preimage: "Copy preimage",
     },
     de: {
         language: "Deutsch",
diff --git a/src/status/TransactionClaimed.tsx b/src/status/TransactionClaimed.tsx
index 9d8d5cf4..e5a02a1d 100644
--- a/src/status/TransactionClaimed.tsx
+++ b/src/status/TransactionClaimed.tsx
@@ -1,13 +1,19 @@
 import { useNavigate } from "@solidjs/router";
 import { BigNumber } from "bignumber.js";
-import { Show, createEffect, createSignal } from "solid-js";
+import log from "loglevel";
+import { Show, createEffect, createResource, createSignal } from "solid-js";
 
+import CopyButton from "../components/CopyButton";
 import LoadingSpinner from "../components/LoadingSpinner";
 import { RBTC } from "../consts/Assets";
 import { SwapType } from "../consts/Enums";
 import { useGlobalContext } from "../context/Global";
 import { usePayContext } from "../context/Pay";
+import { getSubmarinePreimage } from "../utils/boltzClient";
 import { formatAmount } from "../utils/denomination";
+import { formatError } from "../utils/errors";
+import { checkInvoicePreimage } from "../utils/invoice";
+import { SubmarineSwap } from "../utils/swapCreator";
 
 const Broadcasting = () => {
     const { t } = useGlobalContext();
@@ -22,13 +28,38 @@ const Broadcasting = () => {
 
 const TransactionClaimed = () => {
     const navigate = useNavigate();
+
+    const { notify } = useGlobalContext();
     const { swap } = usePayContext();
-    const { t, denomination, separator } = useGlobalContext();
+    const { t, denomination, separator, setSwapStorage } = useGlobalContext();
 
     const [claimBroadcast, setClaimBroadcast] = createSignal<
         boolean | undefined
     >(undefined);
 
+    const [preimage] = createResource(async () => {
+        const submarine = swap() as SubmarineSwap;
+        if (submarine?.type !== SwapType.Submarine) {
+            return undefined;
+        }
+
+        if (submarine.preimage !== undefined) {
+            return submarine.preimage;
+        }
+
+        const res = await getSubmarinePreimage(submarine.id);
+        try {
+            await checkInvoicePreimage(submarine.invoice, res.preimage);
+        } catch (e) {
+            log.error("Preimage check failed", e);
+            notify("error", formatError(e));
+        }
+
+        submarine.preimage = res.preimage;
+        await setSwapStorage(submarine);
+        return res.preimage;
+    });
+
     createEffect(() => {
         const s = swap();
         if (s === undefined || s === null) {
@@ -62,6 +93,9 @@ const TransactionClaimed = () => {
                 <span class="btn" onClick={() => navigate("/swap")}>
                     {t("new_swap")}
                 </span>
+                <Show when={!preimage.loading && preimage() !== undefined}>
+                    <CopyButton label={"copy_preimage"} data={preimage()} />
+                </Show>
             </Show>
         </div>
     );
diff --git a/src/utils/boltzClient.ts b/src/utils/boltzClient.ts
index 1b0d1b8e..2512e510 100644
--- a/src/utils/boltzClient.ts
+++ b/src/utils/boltzClient.ts
@@ -443,6 +443,9 @@ export const getChainSwapNewQuote = (id: string) =>
 export const acceptChainSwapNewQuote = (id: string, amount: number) =>
     fetcher<object>(`/v2/swap/chain/${id}/quote`, { amount });
 
+export const getSubmarinePreimage = (id: string) =>
+    fetcher<{ preimage: string }>(`/v2/swap/submarine/${id}/preimage`);
+
 export {
     Pairs,
     Contracts,
diff --git a/src/utils/invoice.ts b/src/utils/invoice.ts
index 96419068..1ef88308 100644
--- a/src/utils/invoice.ts
+++ b/src/utils/invoice.ts
@@ -1,5 +1,6 @@
 import { bech32, utf8 } from "@scure/base";
 import { BigNumber } from "bignumber.js";
+import { crypto } from "bitcoinjs-lib";
 import bolt11 from "bolt11";
 import log from "loglevel";
 
@@ -302,3 +303,15 @@ export const validateInvoiceForOffer = async (
 
     throw "invoice does not belong to offer";
 };
+
+export const checkInvoicePreimage = async (
+    invoice: string,
+    preimage: string,
+) => {
+    const dec = await decodeInvoice(invoice);
+    const hash = crypto.sha256(Buffer.from(preimage, "hex")).toString("hex");
+
+    if (hash !== dec.preimageHash) {
+        throw "invalid preimage";
+    }
+};
diff --git a/src/utils/swapCreator.ts b/src/utils/swapCreator.ts
index de9c1d04..e4c4752e 100644
--- a/src/utils/swapCreator.ts
+++ b/src/utils/swapCreator.ts
@@ -42,6 +42,7 @@ export type SwapBase = {
 export type SubmarineSwap = SwapBase &
     SubmarineCreatedResponse & {
         invoice: string;
+        preimage?: string;
         refundPrivateKey?: string;
     };
 
diff --git a/tests/status/TransactionClaimed.spec.tsx b/tests/status/TransactionClaimed.spec.tsx
index 6b48cabf..4d570fd3 100644
--- a/tests/status/TransactionClaimed.spec.tsx
+++ b/tests/status/TransactionClaimed.spec.tsx
@@ -1,6 +1,7 @@
 import { render, screen } from "@solidjs/testing-library";
 
 import { BTC, LBTC, RBTC } from "../../src/consts/Assets";
+import { SwapType } from "../../src/consts/Enums";
 import i18n from "../../src/i18n/i18n";
 import TransactionClaimed from "../../src/status/TransactionClaimed";
 import { TestComponent, contextWrapper, payContext } from "../helper";
@@ -18,13 +19,13 @@ describe("TransactionClaimed", () => {
 
     test.each`
         name                                                | swap
-        ${"normal swaps"}                                   | ${{ reverse: false }}
+        ${"normal swaps"}                                   | ${{ type: SwapType.Submarine }}
         ${"reverse swaps to RBTC"} | ${{
-    reverse: true,
-    asset: RBTC,
+    type: SwapType.Reverse,
+    assetReceive: RBTC,
 }}
-        ${"reverse swaps to BTC with claim transactions"}   | ${{ reverse: true, asset: BTC, claimTx: "txid" }}
-        ${"reverse swaps to L-BTC with claim transactions"} | ${{ reverse: true, asset: LBTC, claimTx: "txid" }}
+        ${"reverse swaps to BTC with claim transactions"}   | ${{ type: SwapType.Reverse, assetReceive: BTC, claimTx: "txid" }}
+        ${"reverse swaps to L-BTC with claim transactions"} | ${{ type: SwapType.Reverse, assetReceive: LBTC, claimTx: "txid" }}
     `("should show success for $name", async ({ swap }) => {
         render(
             () => (
diff --git a/tests/utils/invoice.spec.ts b/tests/utils/invoice.spec.ts
index 903f9b24..4a3a7d44 100644
--- a/tests/utils/invoice.spec.ts
+++ b/tests/utils/invoice.spec.ts
@@ -2,6 +2,7 @@ import bolt11 from "bolt11";
 
 import { setConfig } from "../../src/config";
 import {
+    checkInvoicePreimage,
     decodeInvoice,
     extractAddress,
     extractInvoice,
@@ -153,4 +154,16 @@ describe("invoice", () => {
             },
         );
     });
+
+    describe("checkInvoicePreimage", () => {
+        test.each`
+            preimage                                                              | invoice
+            ${"4c8176e16eab0a2282bb47ac8dfceddabffa73e849ea9b6662c44f868a2b4d2a"} | ${"lnbcrt1m1pnnvd2tpp55g70uxevgu3ddpkkn8yvwu6ehvme7lr464gdv7thelmzjz7fyqsqdqqcqzzsxqyz5vqsp5l6n65lrnqmp7lhx9wen493zvkg9gfrksx0lren5m34wy5ge2x6fq9p4gqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqpqysgqdxrky9sy3sk6zuh6x9gtga2trtqapyj69zel0lp6xv8xmrqzst3ja2mxsfsaq7ccffnl27pyzyhj8t8eylq792khl3ha3x8qgxca87qpfyqk7l"}
+        `(
+            "should check preimage for invoice",
+            async ({ invoice, preimage }) => {
+                await checkInvoicePreimage(invoice, preimage);
+            },
+        );
+    });
 });