diff --git a/web/cashtab/src/components/Authentication/ProtectableComponentWrapper.js b/web/cashtab/src/components/Authentication/ProtectableComponentWrapper.js
--- a/web/cashtab/src/components/Authentication/ProtectableComponentWrapper.js
+++ b/web/cashtab/src/components/Authentication/ProtectableComponentWrapper.js
@@ -15,7 +15,7 @@
         }
 
         // prompt if user would like to enable biometric lock when the app first run
-        if (isAuthenticationRequired === undefined) {
+        if (typeof isAuthenticationRequired === 'undefined') {
             return <SignUp />;
         }
 
diff --git a/web/cashtab/src/components/Configure/Configure.js b/web/cashtab/src/components/Configure/Configure.js
--- a/web/cashtab/src/components/Configure/Configure.js
+++ b/web/cashtab/src/components/Configure/Configure.js
@@ -643,7 +643,7 @@
                 // in the edge case of a fresh new wallet on a fresh new browser, remove the initialization entry to avoid an undefined contact in array
                 if (
                     tempContactListArray &&
-                    tempContactListArray[0].address === undefined
+                    typeof tempContactListArray[0].address === 'undefined'
                 ) {
                     tempContactListArray.shift();
                 }
@@ -694,7 +694,7 @@
             // in the edge case of a fresh new wallet on a fresh new browser, remove the initialization entry to avoid an undefined contact in array
             if (
                 loadContactListStatus &&
-                loadContactListStatus[0].address === undefined
+                typeof loadContactListStatus[0].address === 'undefined'
             ) {
                 loadContactListStatus.shift();
             }
@@ -793,7 +793,7 @@
         if (renameSuccess) {
             Modal.success({
                 content: `Wallet "${
-                    oldActiveWalletName !== undefined
+                    typeof oldActiveWalletName !== 'undefined'
                         ? oldActiveWalletName
                         : walletToBeRenamed.name
                 }" renamed to "${newWalletName}"`,
diff --git a/web/cashtab/src/hooks/useWebAuthentication.js b/web/cashtab/src/hooks/useWebAuthentication.js
--- a/web/cashtab/src/hooks/useWebAuthentication.js
+++ b/web/cashtab/src/hooks/useWebAuthentication.js
@@ -94,7 +94,7 @@
 
     // save the config whenever it is changed
     useEffect(async () => {
-        if (isAuthenticationRequired === undefined) return;
+        if (typeof isAuthenticationRequired === 'undefined') return;
         await saveAuthenticationConfigToLocalStorage();
     }, [isAuthenticationRequired, credentialId]);
 
diff --git a/web/cashtab/src/utils/formatting.js b/web/cashtab/src/utils/formatting.js
--- a/web/cashtab/src/utils/formatting.js
+++ b/web/cashtab/src/utils/formatting.js
@@ -21,7 +21,7 @@
         if (fiatBalance === 0) {
             return Number(fiatBalance).toFixed(currency.cashDecimals);
         }
-        if (optionalLocale === undefined) {
+        if (typeof optionalLocale === 'undefined') {
             return fiatBalance.toLocaleString({
                 maximumFractionDigits: currency.cashDecimals,
             });
@@ -36,10 +36,10 @@
 
 export const formatSavedBalance = (swBalance, optionalLocale) => {
     try {
-        if (swBalance === undefined) {
+        if (typeof swBalance === 'undefined') {
             return 'N/A';
         } else {
-            if (optionalLocale === undefined) {
+            if (typeof optionalLocale === 'undefined') {
                 return new Number(swBalance).toLocaleString({
                     maximumFractionDigits: currency.cashDecimals,
                 });
@@ -56,7 +56,7 @@
 
 export const formatBalance = (unformattedBalance, optionalLocale) => {
     try {
-        if (optionalLocale === undefined) {
+        if (typeof optionalLocale === 'undefined') {
             return new Number(unformattedBalance).toLocaleString({
                 maximumFractionDigits: currency.cashDecimals,
             });
@@ -82,8 +82,8 @@
     let locale = defaultLocale;
     try {
         if (
-            tokenDecimal === undefined ||
-            unformattedBalance === undefined ||
+            typeof tokenDecimal === 'undefined' ||
+            typeof unformattedBalance === 'undefined' ||
             typeof tokenDecimal !== 'number' ||
             !BigNumber.isBigNumber(unformattedBalance)
         ) {