diff --git a/src/guide/send_payment.md b/src/guide/send_payment.md
index 623ac4e..1b897f8 100644
--- a/src/guide/send_payment.md
+++ b/src/guide/send_payment.md
@@ -8,7 +8,10 @@ Once you have outbound liquidity you can start sending payments too.
 
 ```rust,ignore
 let bolt11 = "...";
-sdk.send_payment(bolt11.into(), None).await?;
+// The `amount_msat` param is optional and should only passed if the bolt11 doesn't specify an amount.
+// The amount_msat is required in case an amount is not specified in the bolt11 invoice'.
+let amount_msat: Option<u64> = None;
+sdk.send_payment(bolt11.into(), amount_msat).await?;
 ```
 </section>
 
@@ -20,7 +23,7 @@ let bolt11 = "...";
 do {
   // The `amount_msat` param is optional and should only passed if the bolt11 doesn't specify an amount.
   // The amount_msat is required in case an amount is not specified in the bolt11 invoice'.
-  let payment = try sdk.sendPayment(bolt11: bolt11, amount_msat: 3000)
+  let payment = try sdk.sendPayment(bolt11: bolt11, amount_msat: 3000000)
 } catch {
     // handle error
 }
@@ -33,7 +36,10 @@ do {
 ```kotlin,ignore
 val bolt11 = "..."
 try {
-    val payment = sdk.sendPayment(bolt11, 3000L.toULong())
+    // The `amount_msat` param is optional and should only passed if the bolt11 doesn't specify an amount.
+    // The amount_msat is required in case an amount is not specified in the bolt11 invoice'.
+    var amount_msat = 3000000L.toULong()
+    val payment = sdk.sendPayment(bolt11, amount_msat)
 } catch (e: Exception) {
     // handle error
 }
@@ -46,7 +52,10 @@ try {
 ```typescript
 const bolt11 = "..."
 try {
-    const payment = await sendPayment(bolt11, 3000)
+    // The `amount_msat` param is optional and should only passed if the bolt11 doesn't specify an amount.
+    // The amount_msat is required in case an amount is not specified in the bolt11 invoice'.
+    const amount_msat = 3000000
+    const payment = await sendPayment(bolt11, amount_msat)
 } catch (error) {
     console.log(error)
 }
@@ -59,6 +68,8 @@ try {
 ```dart
 String bolt11 = "...";
 try {
+    // The `amount_msat` param is optional and should only passed if the bolt11 doesn't specify an amount.
+    // The amount_msat is required in case an amount is not specified in the bolt11 invoice'.
     Payment payment = await sendPayment(
       bolt11: bolt11,
       amount_msat: 3000,
@@ -88,7 +99,9 @@ except Exception as error:
 
 ```go
 bolt11 := "bolt11 invoice"
-amount_msat := uint64(3000)
+// The `amount_msat` param is optional and should only passed if the bolt11 doesn't specify an amount.
+// The amount_msat is required in case an amount is not specified in the bolt11 invoice'.
+amount_msat := uint64(3000000)
 if payment, err := sdk.SendPayment(bolt11, &amount_msat); err == nil {
     log.Printf("%#v", payment)
 }
@@ -102,7 +115,10 @@ if payment, err := sdk.SendPayment(bolt11, &amount_msat); err == nil {
 var bolt11 = "...";
 try 
 {
-    var payment = sdk.SendPayment(bolt11, 3000);
+    // The `amount_msat` param is optional and should only passed if the bolt11 doesn't specify an amount.
+    // The amount_msat is required in case an amount is not specified in the bolt11 invoice'.
+    var amount_msat = 3000000;
+    var payment = sdk.SendPayment(bolt11, amount_msat);
 } 
 catch (Exception) 
 {