diff --git a/.env.example b/.env.example
index 7da56a2e3..6be73a6f8 100644
--- a/.env.example
+++ b/.env.example
@@ -16,6 +16,9 @@ NEXT_PUBLIC_WEBAPP_URL='http://localhost:3000'
 NEXTAUTH_SECRET='lorem ipsum sit dolor random string for encryption this could literally be anything'
 NEXTAUTH_URL='http://localhost:3000'
 
+# SIGNING
+CERT_FILE_PATH=
+
 # MAIL (NODEMAILER)
 # SENDGRID
 # Get a Sendgrid Api key here: https://signup.sendgrid.com
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 17ceca23e..2b4738c00 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -13,7 +13,13 @@
   "editor.codeActionsOnSave": {
     "source.removeUnusedImports": false
   },
-  "typescript.tsdk": "node_modules\\typescript\\lib",
-  "spellright.language": ["de"],
-  "spellright.documentTypes": ["markdown", "latex", "plaintext"]
-}
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "spellright.language": [
+    "de"
+  ],
+  "spellright.documentTypes": [
+    "markdown",
+    "latex",
+    "plaintext"
+  ]
+}
\ No newline at end of file
diff --git a/apps/web/pages/documents/[id]/sign.tsx b/apps/web/pages/documents/[id]/sign.tsx
index 252d0f429..3ad4bac1a 100644
--- a/apps/web/pages/documents/[id]/sign.tsx
+++ b/apps/web/pages/documents/[id]/sign.tsx
@@ -59,7 +59,7 @@ export async function getServerSideProps(context: any) {
     },
   });
 
-  const recipient = await prisma.recipient.findFirstOrThrow({
+  const recipient = await prisma.recipient.findFirst({
     where: {
       token: recipientToken,
     },
@@ -68,6 +68,15 @@ export async function getServerSideProps(context: any) {
     },
   });
 
+  if (!recipient) {
+    return {
+      redirect: {
+        permanent: false,
+        destination: "/404",
+      },
+    };
+  }
+
   // Document is already signed
   if (recipient.Document.status === DocumentStatus.COMPLETED) {
     return {
diff --git a/packages/signing/addDigitalSignature.ts b/packages/signing/addDigitalSignature.ts
index b77c60138..dd7569f50 100644
--- a/packages/signing/addDigitalSignature.ts
+++ b/packages/signing/addDigitalSignature.ts
@@ -1,4 +1,5 @@
-import { PDFDocument, PDFHexString, PDFName, PDFNumber, PDFString } from "pdf-lib";
+import { PDFAcroSignature, PDFDocument, PDFHexString, PDFName, PDFNumber, PDFSignature, PDFString } from "pdf-lib";
+
 
 const fs = require("fs");
 // Local copy of Node SignPDF because https://github.com/vbuch/node-signpdf/pull/187 was not published in NPM yet. Can be switched to npm packge.
@@ -8,8 +9,8 @@ export const addDigitalSignature = async (documentAsBase64: string): Promise<str
   // Custom code to add Byterange to PDF
   const PDFArrayCustom = require("./PDFArrayCustom");
   const pdfBuffer = Buffer.from(documentAsBase64, "base64");
-  const p12Buffer = fs.readFileSync("ressources/certificate.p12");
-  const SIGNATURE_LENGTH = 4540;
+  const p12Buffer = fs.readFileSync(process.env.CERT_FILE_PATH || "ressources/cert.p12");
+  const SIGNATURE_LENGTH = 12000;
 
   const pdfDoc = await PDFDocument.load(pdfBuffer);
   const pages = pdfDoc.getPages();
@@ -64,4 +65,4 @@ export const addDigitalSignature = async (documentAsBase64: string): Promise<str
   });
 
   return signedPdfBuffer.toString("base64");
-};
+};
\ No newline at end of file