diff --git a/src/services/registration.services.js b/src/services/registration.services.js
index 9a892e3..9b0664c 100644
--- a/src/services/registration.services.js
+++ b/src/services/registration.services.js
@@ -1,8 +1,6 @@
 const auth = require("../utils/auth.utils");
 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");
 
 import { logger } from "../utils/logger.utils";
@@ -33,38 +31,7 @@ async function createRegKey(body) {
   } else {
     return { status: 400, errorCode: 901, errorMsg: errors[902] };
   }
-}  // NEXT-- UPDATE EMAIL TEMPLATE TO ACCEPT SIX DIGIT CODE RATHER THAN UUID - HTML TEMPLATE NEEDS COMPLETELY REDOING
-
-/* OLD FUNCTION
-async function createRegKey(body) {
-  logger.debug("registerServices.createRegKey: Incoming request");
-  if (body.email) {
-    const domain = await clean.getDomainFromEmail(body.email);
-    logger.info(`registerServices: Registration request from: ${domain}`);
-    if (domains.includes(domain)) {
-      logger.debug(`registerServices.createRegKey: Key from valid: ${domain}`);
-      const uuid = await auth.generateKey();
-      db.addRegReq(uuid, domain);
-      const message = await auth.generateConfirmationEmail(body.email, uuid);
-      if (!message) {
-        const err = new Error("Message generation error");
-        logger.error(
-          err,
-          "registerServices.createRegKey: Error generating email"
-        );
-        return 500;
-      }
-      if ((await mail.send(message)) == true) {
-        return { status: 201, message: "email sent" };
-      }
-      return { status: 500, errorCode: 950, errorMsg: errors[950] };
-    }
-    return { status: 403, errorCode: 702, errorMsg: errors[702] };
-  } else {
-    return { status: 400, errorCode: 901, errorMsg: errors[902] };
-  }
 }
-*/
 
 async function regUser(req) {
   // Add input validation
diff --git a/src/utils/auth.utils.ts b/src/utils/auth.utils.ts
index c452a6e..1c9c75e 100644
--- a/src/utils/auth.utils.ts
+++ b/src/utils/auth.utils.ts
@@ -20,7 +20,6 @@ async function isAuthed(uuid: string): Promise<boolean> {
 
 // Checks whether a registration request key is valid
 async function checkRequest(key: string) {
-  // For some reason db.query seems to return correctly, but the second logs.out statement prints []???  so registration fails!!
   const collection = "registrations";
   const query = { uuid: key };
   const res = await db.query(collection, query);
@@ -34,14 +33,21 @@ async function checkRequest(key: string) {
 
 // Creates an API key for a user
 async function generateKey() {
-  // Needs testing & moving to 'register.utils' ??? Why does it need moving?
   return crypt.randomUUID();
 }
 
 export function generateCode(): string {
-  const bytes = crypt.randomBytes(3);
-  const randomNumber = bytes.readUIntBE(0, 3) % 1000000;
-  return randomNumber.toString().padStart(6, '0');
+  const characters = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789';
+  const codeLength = 6;
+
+  let code = '';
+  const bytes = crypt.randomBytes(codeLength); // Generate random bytes
+  for (let i = 0; i < codeLength; i++) {
+    const randomIndex = bytes[i] % characters.length; // Map bytes to characters
+    code += characters.charAt(randomIndex);
+  }
+
+  return code;
 }
 
 async function generateConfirmationEmail(eml: string, uuid: string) {