diff --git a/gui/src/main/java/io/bitsquare/gui/util/validation/EmailValidator.java b/gui/src/main/java/io/bitsquare/gui/util/validation/EmailValidator.java
index d86d336792..76c055851f 100644
--- a/gui/src/main/java/io/bitsquare/gui/util/validation/EmailValidator.java
+++ b/gui/src/main/java/io/bitsquare/gui/util/validation/EmailValidator.java
@@ -59,6 +59,9 @@ public final class EmailValidator extends InputValidator {
         local = subStrings[0];
         domain = subStrings[subStrings.length - 1];
 
+        if (local.isEmpty())
+            return invalidAddress;
+
         // local part cannot begin or end with '.'
         if (local.startsWith(".") || local.endsWith("."))
             return invalidAddress;
diff --git a/gui/src/main/java/io/bitsquare/gui/util/validation/InteracETransferValidator.java b/gui/src/main/java/io/bitsquare/gui/util/validation/InteracETransferValidator.java
index 5858a0b361..430d0b99b7 100644
--- a/gui/src/main/java/io/bitsquare/gui/util/validation/InteracETransferValidator.java
+++ b/gui/src/main/java/io/bitsquare/gui/util/validation/InteracETransferValidator.java
@@ -17,17 +17,41 @@
 
 package io.bitsquare.gui.util.validation;
 
+/*
+ * Interac e-Transfer requires a mail address or Canadian (mobile) phone number
+ *
+ * Mail addresses are covered with class EmailValidator
+ *
+ * Phone numbers have 11 digits, expected format is +1 NPA xxx-xxxx
+ * Plus, spaces and dash might be omitted
+ * Canadian area codes (NPA) taken from http://www.cnac.ca/canadian_dial_plan/Current_&_Future_Dialling_Plan.pdf
+ * Valid (as of 2017-06-27) NPAs are hardcoded here
+ * They are to change in some future (according to the linked document around 2019/2020)
+ */
 
 public final class InteracETransferValidator extends InputValidator {
 
+    private static final String[] NPAS = {"204", "226", "236", "249", "250", "289", "306", "343", "365", "403", "416", "418", "431", "437", "438", "450", "506", "514", "519", "548", "579", "581", "587", "604", "613", "639", "647", "705", "709", "778", "780", "782", "807", "819", "825", "867", "873", "902", "905"};
+    private final EmailValidator emailValidator;
+
+
     ///////////////////////////////////////////////////////////////////////////////////////////
     // Public methods
     ///////////////////////////////////////////////////////////////////////////////////////////
 
+    public InteracETransferValidator() {
+        super();
+        emailValidator = new EmailValidator();
+    }
+
     @Override
     public ValidationResult validate(String input) {
-        // TODO
-        return super.validate(input);
+        if (input == null)
+            return new ValidationResult(false, "input is null");
+        ValidationResult emailResult = emailValidator.validate(input);
+        if (!emailResult.isValid)
+            return validatePhoneNumber(input);
+        return emailResult;
     }
 
 
@@ -35,5 +59,22 @@ public final class InteracETransferValidator extends InputValidator {
     // Private methods
     ///////////////////////////////////////////////////////////////////////////////////////////
 
+    private ValidationResult validatePhoneNumber(String input) {
 
+        // check for correct format and strip +, space and -
+        if (input.matches("\\+?1 ?\\d\\d\\d ?\\d\\d\\d-?\\d\\d\\d\\d")) {
+            input = input.replace("+", "");
+            input = input.replace(" ", "");
+            input = input.replace("-", "");
+
+            String inputAreaCode = input.substring(1, 4);
+            for (String s : NPAS) {
+                // check area code agains list and return if valid
+                if (inputAreaCode.compareTo(s) == 0)
+                    return new ValidationResult(true);
+            }
+        } else
+            return new ValidationResult(false, "Invalid phone number format and not an email address");
+        return new ValidationResult(false, "Non-Canadian area code");
+    }
 }