diff --git a/p2p_wallet/Common/Extensions/Double+Extensions.swift b/p2p_wallet/Common/Extensions/Double+Extensions.swift
index 0d4058ac9f..26c12f10b6 100644
--- a/p2p_wallet/Common/Extensions/Double+Extensions.swift
+++ b/p2p_wallet/Common/Extensions/Double+Extensions.swift
@@ -145,3 +145,18 @@ extension Double {
         "\(toString(maximumFractionDigits: maximumFractionDigits, roundingMode: roundingMode)) \(currency.code)"
     }
 }
+
+extension Double {
+    // Check if lamport value is smaller than UInt64 max
+    func isLamportsBiggerThanUInt64(decimals: Int) -> Bool {
+        let value = (self * Double.pow(10, Double(decimals))).rounded()
+        let maxValue = Decimal(UInt64.max)
+
+        if Decimal(value) > maxValue {
+            debugPrint("\(value) overflows Int64 max \(maxValue)")
+            return true
+        }
+
+        return false
+    }
+}
diff --git a/p2p_wallet/Scenes/Main/Send/Input/Subviews/AmountView/SendInputAmountField.swift b/p2p_wallet/Scenes/Main/Send/Input/Subviews/AmountView/SendInputAmountField.swift
index 6c1c687e8d..6b31f0eef4 100644
--- a/p2p_wallet/Scenes/Main/Send/Input/Subviews/AmountView/SendInputAmountField.swift
+++ b/p2p_wallet/Scenes/Main/Send/Input/Subviews/AmountView/SendInputAmountField.swift
@@ -103,6 +103,10 @@ struct SendInputAmountField: UIViewRepresentable {
 
             let number = Double(updatedText.replacingOccurrences(of: " ", with: ""))
 
+            if number?.isLamportsBiggerThanUInt64(decimals: countAfterDecimalPoint) == true {
+                return false
+            }
+
             if (string.isEmpty || string.starts(with: "0"))
                 && updatedText.starts(with: "0\(decimalSeparator)")
                 && number == 0
diff --git a/p2p_wallet/UI/SwiftUI/TextField/AmountTextField.swift b/p2p_wallet/UI/SwiftUI/TextField/AmountTextField.swift
index b486717c65..d192b298f9 100644
--- a/p2p_wallet/UI/SwiftUI/TextField/AmountTextField.swift
+++ b/p2p_wallet/UI/SwiftUI/TextField/AmountTextField.swift
@@ -173,12 +173,21 @@ final class AmountUITextField: UITextField, UITextFieldDelegate {
         let updatedText = text
             .replacingCharacters(in: textRange, with: string)
             .replacingOccurrences(of: decimalSeparator == "." ? "," : ".", with: decimalSeparator)
+
         if (updatedText.components(separatedBy: decimalSeparator).count - 1) > 1 {
             return false
         }
-        if updatedText.components(separatedBy: decimalSeparator).last?.count ?? 0 > maxFractionDigits.wrappedValue {
+
+        if updatedText.contains(decimalSeparator) && updatedText.components(separatedBy: decimalSeparator).last?
+            .count ?? 0 > maxFractionDigits.wrappedValue
+        {
+            return false
+        }
+
+        if Double(updatedText)?.isLamportsBiggerThanUInt64(decimals: maxFractionDigits.wrappedValue) == true {
             return false
         }
+
         return isNotMoreThanMax(text: updatedText.amountFormat(
             maxAfterComma: maxFractionDigits.wrappedValue,
             decimalSeparator: decimalSeparator