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Validate Fields

Help customers enter correct information by using software to validate their input. Check required fields to ensure that they contain data. Because there are so many formats for addresses and city names, it is difficult to verify the actual content of these fields. For the State field, if all commerce must be conducted within the United States, the field could be restricted to a pick list of states. For international ordering, a pick list for country can guarantee the integrity of the information customers submit. One trade-off is that pick lists this large can be difficult to navigate. You may want to verify that the phone number contains only numbers and legal punctuation, but if you allow international phone numbers, the formats may be very different. Your goal should be PREVENTING ERRORS (K12), but when they do occur, you can use field validation and MEANINGFUL ERROR MESSAGES (K13) to help your customer recover.


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