diff --git a/packages/examples/src/scripts/countdown.ts b/packages/examples/src/scripts/countdown.ts
index fa7c2e25c..f65306204 100644
--- a/packages/examples/src/scripts/countdown.ts
+++ b/packages/examples/src/scripts/countdown.ts
@@ -127,7 +127,7 @@ WoT.produce({
             "startCountdown",
             async (params: WoT.InteractionOutput, options): Promise<WoT.InteractionInput> => {
                 let initValue = 100;
-                if (params) {
+                if (params !== undefined) {
                     const value = await params.value();
                     if (typeof value === "number") {
                         initValue = value as number;
@@ -147,7 +147,7 @@ WoT.produce({
         thing.setActionHandler(
             "stopCountdown",
             async (params: WoT.InteractionOutput, options): Promise<WoT.InteractionInput> => {
-                if (params) {
+                if (params !== undefined) {
                     const value = await params.value();
                     if (typeof value === "string" && countdowns.has(value)) {
                         const as = countdowns.get(value);
@@ -170,7 +170,7 @@ WoT.produce({
         thing.setActionHandler(
             "monitorCountdown",
             async (params: WoT.InteractionOutput, options): Promise<WoT.InteractionInput> => {
-                if (params) {
+                if (params !== undefined) {
                     const value = await params.value();
                     if (typeof value === "string" && countdowns.has(value)) {
                         const as = countdowns.get(value);
diff --git a/packages/examples/src/scripts/smart-coffee-machine-client.ts b/packages/examples/src/scripts/smart-coffee-machine-client.ts
index 05e745c35..767cba1ef 100644
--- a/packages/examples/src/scripts/smart-coffee-machine-client.ts
+++ b/packages/examples/src/scripts/smart-coffee-machine-client.ts
@@ -61,7 +61,7 @@ WoTHelpers.fetch("http://127.0.0.1:8080/smart-coffee-machine").then(async (td) =
             uriVariables: { drinkId: "latte", size: "l", quantity: 3 },
         });
         const makeCoffeep = (await makeCoffee?.value()) as Record<string, unknown>;
-        if (makeCoffeep.result) {
+        if (makeCoffeep.result !== undefined) {
             log("Enjoy your drink!", makeCoffeep);
         } else {
             log("Failed making your drink:", makeCoffeep);
diff --git a/packages/examples/src/scripts/smart-coffee-machine.ts b/packages/examples/src/scripts/smart-coffee-machine.ts
index 896ebe947..17f11a225 100644
--- a/packages/examples/src/scripts/smart-coffee-machine.ts
+++ b/packages/examples/src/scripts/smart-coffee-machine.ts
@@ -396,7 +396,7 @@ Assumes one medium americano if not specified, but time and mode are mandatory f
             const paramsp = (await params.value()) as Record<string, unknown>; //  : any = await Helpers.parseInteractionOutput(params);
 
             // Check if uriVariables are provided
-            if (paramsp && typeof paramsp === "object" && "time" in paramsp && "mode" in paramsp) {
+            if (paramsp !== undefined && typeof paramsp === "object" && "time" in paramsp && "mode" in paramsp) {
                 // Use default values if not provided
                 paramsp.drinkId = "drinkId" in paramsp ? paramsp.drinkId : "americano";
                 paramsp.size = "size" in paramsp ? paramsp.size : "m";