diff --git a/templates/portal_invoice_detail.html b/templates/portal_invoice_detail.html
index f907265..2191a1d 100644
--- a/templates/portal_invoice_detail.html
+++ b/templates/portal_invoice_detail.html
@@ -537,19 +537,32 @@ Reference: ${invoiceRef}`;
                 const decimals = Number(walletButton.dataset.decimals || "18");
                 const tokenContract = walletButton.dataset.tokenContract || "";
 
-                await window.ethereum.request({ method: "eth_requestAccounts" });
+                const accounts = await window.ethereum.request({ method: "eth_requestAccounts" });
+                const from = Array.isArray(accounts) && accounts.length ? accounts[0] : "";
+                if (!from) {
+                    throw new Error("Wallet did not return an account address.");
+                }
+
                 await switchChain(chainId);
 
                 let txHash;
                 if (assetType === "native") {
                     txHash = await window.ethereum.request({
                         method: "eth_sendTransaction",
-                        params: [{ to: to, value: toHexBigIntFromDecimal(amount, decimals) }]
+                        params: [{
+                            from: from,
+                            to: to,
+                            value: toHexBigIntFromDecimal(amount, decimals)
+                        }]
                     });
                 } else {
                     txHash = await window.ethereum.request({
                         method: "eth_sendTransaction",
-                        params: [{ to: tokenContract, data: erc20TransferData(to, amount, decimals) }]
+                        params: [{
+                            from: from,
+                            to: tokenContract,
+                            data: erc20TransferData(to, amount, decimals)
+                        }]
                     });
                 }