diff --git a/app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/SendTransactionFragment.kt b/app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/SendTransactionFragment.kt
index 1087f34..3fcfea0 100644
--- a/app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/SendTransactionFragment.kt
+++ b/app/src/main/java/cy/agorise/bitsybitshareswallet/fragments/SendTransactionFragment.kt
@@ -82,6 +82,7 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
     private var isCameraPreviewVisible = false
     private var isToAccountCorrect = false
     private var isAmountCorrect = false
+    private var isMemoCorrect = true
 
     private var mBalancesDetails = ArrayList<BalanceDetail>()
 
@@ -213,6 +214,19 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
                 .subscribe { validateAmount() }
         )
 
+        // Use RxJava Debounce to update the Memo error, to make sure it has the correct length
+        mDisposables.add(
+            tietMemo.textChanges()
+                .skipInitialValue()
+                .debounce(500, TimeUnit.MILLISECONDS)
+                .observeOn(AndroidSchedulers.mainThread())
+                .map { it.toString().trim() }
+                .subscribe {
+                    isMemoCorrect = it.length <= tilMemo.counterMaxLength
+                    enableDisableSendFAB()
+                }
+        )
+
         // Populates the To field if a Deep Link was used
         if (args.to != " " && args.asset != " " && args.amount > 0 && args.memo != " ") {
             val items = arrayOf(LineItem("transfer", 1, args.amount.toDouble()))
@@ -488,7 +502,7 @@ class SendTransactionFragment : ConnectedFragment(), ZXingScannerView.ResultHand
     }
 
     private fun enableDisableSendFAB() {
-        if (isToAccountCorrect && isAmountCorrect) {
+        if (isToAccountCorrect && isAmountCorrect && isMemoCorrect) {
             fabSendTransaction.enable(R.color.colorSend)
             vSend.setBackgroundResource(R.drawable.send_fab_background)
         } else {
diff --git a/app/src/main/res/layout/fragment_send_transaction.xml b/app/src/main/res/layout/fragment_send_transaction.xml
index 414b647..37f8ae1 100644
--- a/app/src/main/res/layout/fragment_send_transaction.xml
+++ b/app/src/main/res/layout/fragment_send_transaction.xml
@@ -133,6 +133,8 @@
             android:layout_marginStart="@dimen/activity_horizontal_margin"
             android:layout_marginEnd="@dimen/activity_horizontal_margin"
             android:hint="@string/text__memo"
+            app:counterEnabled="true"
+            app:counterMaxLength="100"
             app:layout_constraintTop_toBottomOf="@id/tilAmount"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent">
@@ -150,7 +152,6 @@
             android:id="@+id/tvScan"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginTop="@dimen/spacing_same_topic"
             android:layout_marginStart="@dimen/activity_horizontal_margin"
             android:text="@string/text__scan_qr"
             android:textAppearance="@style/TextAppearance.Bitsy.Body1"