diff --git a/doc/Doichain-WhitePaper.odt b/doc/Doichain-WhitePaper.odt
index 5eeebbd2..024bd091 100644
Binary files a/doc/Doichain-WhitePaper.odt and b/doc/Doichain-WhitePaper.odt differ
diff --git a/doc/Doichain-WhitePaper.pdf b/doc/Doichain-WhitePaper.pdf
new file mode 100644
index 00000000..92952d47
Binary files /dev/null and b/doc/Doichain-WhitePaper.pdf differ
diff --git a/doc/Doichain-WhitePaper_Entwurf.odt b/doc/Doichain-WhitePaper_Entwurf.odt
new file mode 100644
index 00000000..0d1eb913
Binary files /dev/null and b/doc/Doichain-WhitePaper_Entwurf.odt differ
diff --git a/imports/modules/server/opt-ins/verify.js b/imports/modules/server/opt-ins/verify.js
index eaa13607..98cd84f0 100644
--- a/imports/modules/server/opt-ins/verify.js
+++ b/imports/modules/server/opt-ins/verify.js
@@ -38,6 +38,7 @@ const verifyOptIn = (data) => {
       signature: entryData.signature,
       publicKey: ourData.recipient_public_key
     })
+
     if(!firstCheck) return false;
     const parts = ourData.recipient_mail.split("@");
     const domain = parts[parts.length-1];
@@ -48,6 +49,7 @@ const verifyOptIn = (data) => {
       signature: entryData.doiSignature,
       publicKey: publicKey
     })
+
     if(!secondCheck) return false;
     return true;
   } catch (exception) {