diff --git a/src/Exception/InvalidCprNumberFormat.php b/src/Exception/InvalidCprNumberFormat.php
new file mode 100644
index 0000000..a732f81
--- /dev/null
+++ b/src/Exception/InvalidCprNumberFormat.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Reload\Cpr\Exception;
+
+class InvalidCprNumberFormat extends \InvalidArgumentException
+{
+}
diff --git a/src/Exception/NonExistingDate.php b/src/Exception/NonExistingDate.php
new file mode 100644
index 0000000..87ecd6d
--- /dev/null
+++ b/src/Exception/NonExistingDate.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Reload\Cpr\Exception;
+
+class NonExistingDate extends \InvalidArgumentException
+{
+}