diff --git a/MFRC522.py b/MFRC522.py
index a2258b3..42eb383 100644
--- a/MFRC522.py
+++ b/MFRC522.py
@@ -287,7 +287,6 @@ class MFRC522:
         (status, backData, backLen) = self.ToCard(self.PCD_TRANSCEIVE, buf)
         
         if (status == self.MI_OK) and (backLen == 0x18):
-            # print "Size: " + str(backData[0])
             return backData[0]
         else:
             return 0
@@ -316,12 +315,6 @@ class MFRC522:
         # Now we start the authentication itself
         (status, backData, backLen) = self.ToCard(self.PCD_AUTHENT,buff)
 
-        # Check if an error occurred
-        # if not(status == self.MI_OK):
-        #     print("AUTH ERROR!!")
-        # if not (self.Read_MFRC522(self.Status2Reg) & 0x08) != 0:
-        #     print("AUTH ERROR(status2reg & 0x08) != 0")
-
         # Return the status
         return status
     
@@ -339,10 +332,7 @@ class MFRC522:
         if not(status == self.MI_OK):
             print("Error while reading!")
         i = 0
-        # if len(backData) == 16:
         return backData
-        # else:
-            # return None
     
     def Write(self, blockAddr, writeData):
         buff = []
@@ -354,7 +344,6 @@ class MFRC522:
         (status, backData, backLen) = self.ToCard(self.PCD_TRANSCEIVE, buff)
         if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A):
             status = self.MI_ERR
-        # print str(backLen)+" backdata &0x0F == 0x0A "+str(backData[0]&0x0F)
         if status == self.MI_OK:
             i = 0
             buf = []
@@ -365,10 +354,8 @@ class MFRC522:
             buf.append(crc[0])
             buf.append(crc[1])
             (status, backData, backLen) = self.ToCard(self.PCD_TRANSCEIVE,buf)
-            # if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A):
-            #     print("Error while writing")
-            # if status == self.MI_OK:
-            #     print "Data written"
+            if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A):
+                status = self.MI_ERR
         return status
 
     def DumpClassic1K(self, key, uid):