diff --git a/src/Input/AbstractInputHandler.php b/src/Input/AbstractInputHandler.php
index 65dbeac..97413e0 100644
--- a/src/Input/AbstractInputHandler.php
+++ b/src/Input/AbstractInputHandler.php
@@ -5,15 +5,40 @@ declare(strict_types=1);
 namespace pointybeard\Helpers\Cli\Input;
 
 use pointybeard\Helpers\Functions\Flags;
+use pointybeard\Helpers\Functions\Debug;
 
 abstract class AbstractInputHandler implements Interfaces\InputHandlerInterface
 {
+    /**
+     * Will skip all validation when bind() is executed. Ignores all other flags
+     * @var integer
+     */
+    const FLAG_BIND_SKIP_VALIDATION = 0x0001;
+
+    /**
+     * Will skip the required input and required values check
+     * @var integer
+     */
+    const FLAG_VALIDATION_SKIP_REQUIRED = 0x0002;
+
+    /**
+     * Will skip running custom validators
+     * @var integer
+     */
+    const FLAG_VALIDATION_SKIP_CUSTOM = 0x0004;
+
+    /**
+     * Will skip checking if an input is in the collection
+     * @var integer
+     */
+    const FLAG_VALIDATION_SKIP_UNRECOGNISED = 0x0008;
+
     protected $input = [];
     protected $collection = null;
 
     abstract protected function parse(): bool;
 
-    public function bind(InputCollection $inputCollection, bool $skipValidation = false): bool
+    final public function bind(InputCollection $inputCollection, ?int $flags = null): bool
     {
         // Do the binding stuff here
         $this->input = [];
@@ -21,8 +46,8 @@ abstract class AbstractInputHandler implements Interfaces\InputHandlerInterface
 
         $this->parse();
 
-        if (true !== $skipValidation) {
-            $this->validate();
+        if (!Flags\is_flag_set($flags, self::FLAG_BIND_SKIP_VALIDATION)) {
+            $this->validate($flags);
         }
 
         return true;
@@ -39,71 +64,85 @@ abstract class AbstractInputHandler implements Interfaces\InputHandlerInterface
         }
     }
 
-    public function validate(): void
-    {
-        foreach ($this->collection->getItems() as $type => $items) {
-            foreach ($items as $input) {
-                self::checkRequiredAndRequiredValue($input, $this->input);
+    protected function validateInput(AbstractInputType $input, ?int $flags) {
+        if(!Flags\is_flag_set($flags, self::FLAG_VALIDATION_SKIP_REQUIRED)) {
+            self::checkRequiredAndRequiredValue($input, $this->input);
+        }
+        // There is a default value, input has not been set, and there
+        // is no validator
+        if (
+            null !== $input->default() &&
+            null === $this->find($input->name()) &&
+            null === $input->validator()
+        ) {
+            $result = $input->default();
 
-                // There is a default value, input has not been set, and there
-                // is no validator
-                if (
-                    null !== $input->default() &&
-                    null === $this->find($input->name()) &&
-                    null === $input->validator()
-                ) {
-                    $result = $input->default();
+        // Input has been set and it has a validator. Skip this if
+        // FLAG_VALIDATION_SKIP_CUSTOM is set
+        } elseif (null !== $this->find($input->name()) && null !== $input->validator() && !Flags\is_flag_set($flags, self::FLAG_VALIDATION_SKIP_CUSTOM)) {
+            $validator = $input->validator();
 
-                // Input has been set and it has a validator
-                } elseif (null !== $this->find($input->name()) && null !== $input->validator()) {
-                    $validator = $input->validator();
-
-                    if ($validator instanceof \Closure) {
-                        $validator = new Validator($validator);
-                    } elseif (!($validator instanceof Validator)) {
-                        throw new \Exception("Validator for '{$input->name()}' must be NULL or an instance of either Closure or Input\Validator.");
-                    }
-
-                    try {
-                        $result = $validator->validate($input, $this);
-                    } catch (\Exception $ex) {
-                        throw new Exceptions\InputValidationFailedException($input, 0, $ex);
-                    }
-
-                    // No default, no validator, but may or may not have been set
-                } else {
-                    $result = $this->find($input->name());
-                }
-
-                $this->input[$input->name()] = $result;
+            if ($validator instanceof \Closure) {
+                $validator = new Validator($validator);
+            } elseif (!($validator instanceof Validator)) {
+                throw new \Exception("Validator for '{$input->name()}' must be NULL or an instance of either Closure or Input\Validator.");
             }
+
+            try {
+                $result = $validator->validate($input, $this);
+            } catch (\Exception $ex) {
+                throw new Exceptions\InputValidationFailedException($input, 0, $ex);
+            }
+
+            // No default, no validator, but may or may not have been set
+        } else {
+            $result = $this->find($input->name());
+        }
+
+        return $result;
+    }
+
+    protected function isInputRecognised(string $name): bool {
+        return null === $this->collection->find($name) ? false : true;
+    }
+
+    final public function validate(?int $flags = null): void
+    {
+        if(!Flags\is_flag_set($flags, self::FLAG_VALIDATION_SKIP_UNRECOGNISED)) {
+            foreach($this->input as $name => $value) {
+                if(false == static::isInputRecognised((string)$name)) {
+                    throw new Exceptions\UnrecognisedInputException("'{$name}' is not recognised");
+                }
+            }
+        }
+
+        foreach ($this->collection->getItems() as $input) {
+            $this->input[$input->name()] = static::validateInput($input, $flags);
         }
     }
 
-    public function find(string $name)
+    final public function find(string $name)
     {
         if (isset($this->input[$name])) {
             return $this->input[$name];
         }
 
         // Check the collection to see if anything responds to $name
-        foreach ($this->collection->getItems() as $type => $items) {
-            foreach ($items as $ii) {
-                if ($ii->respondsTo($name) && isset($this->input[$ii->name()])) {
-                    return $this->input[$ii->name()];
-                }
+        foreach ($this->collection->getItems() as $item) {
+            if ($item->respondsTo($name) && isset($this->input[$item->name()])) {
+                return $this->input[$item->name()];
             }
         }
 
         return null;
     }
 
-    public function getInput(): array
+    final public function getInput(): array
     {
         return $this->input;
     }
 
-    public function getCollection(): ?InputCollection
+    final public function getCollection(): ?InputCollection
     {
         return $this->collection;
     }