Matching Pairs Data ValidationOnline version Types of validation by Miss Butler 1 Lookup table 2 Range check 3 Presence check 4 Check digit 5 Format check 6 Length check 7 Spell check checks the data is in the right format the last one or two digits in a code are used to check the other digits are correct checks the data isn't too short or too long looks up acceptable values in a table looks up words in a dictionary checks that data has been entered into a field checks that a value falls within the specified range