diff --git a/src/configs/statusCodes.configs.js b/src/configs/errorCodes.configs.js
similarity index 72%
rename from src/configs/statusCodes.configs.js
rename to src/configs/errorCodes.configs.js
index ace3c08..88e15d9 100644
--- a/src/configs/statusCodes.configs.js
+++ b/src/configs/errorCodes.configs.js
@@ -2,7 +2,9 @@ module.exports = statusCodes = {
     700: "no authentication attempt",
     701: "invalid credentials",
     702: "domain whitelisted",
+    703: "registration request not found, maybe expired",
     800: "location code not found",
     801: "unable to fetch location data",
     900: "invalid request format",
+    950: "upstream server error",
 }
\ No newline at end of file
diff --git a/src/services/registration.services.js b/src/services/registration.services.js
index dc16afa..6ede7a4 100644
--- a/src/services/registration.services.js
+++ b/src/services/registration.services.js
@@ -4,6 +4,7 @@ const db      = require('./dbAccess.services')
 const mail    = require('./mail.services')
 const clean   = require('../utils/sanitizer.utils')
 const domains = require('../configs/domains.configs')
+const errors  = require('../configs/errorCodes.configs')
 
 async function createRegKey(body) {
     log.out(`registerServices.createRegKey: Incoming request`, "INFO")
@@ -22,9 +23,9 @@ async function createRegKey(body) {
       if (await mail.send(message) == true) {
         return {status: 201, message: "email sent"}
       }
-      return {status: 500, message: "server error, email send failed"}
+      return {status: 500, errorCode: 950, errorMsg: errors[950]}
     }
-    return {status: 403, message: "forbidden, domain is not on whitelist"}
+    return {status: 403, errorCode: 702, errorMsg: errors[702]}
 }
 
 async function regUser(req) { // Add input validation
@@ -40,7 +41,7 @@ async function regUser(req) { // Add input validation
             return {status: 201, message: "User added", api_key: uuid}
         }
     }
-    return {status: 401, message: "Unauthorised"}
+    return {status: 401, errorCode: 703, errorMsg: errors[703]}
 }
 
 module.exports = {