Validation checks:

 The following checks may be carried out:

1.      Presence Check à the program checks that all items of data are present. For example, the customer account number could not be omitted on a sales order.

2.      Character Count à some times such as a customer code or product code are of fixed length.

3.      Format Check à this ensures that certain fields are in the same format.

4.      Range check à this checks that a data (field) lays within a particular range.

5.      Check Digit àan additional digit used to validate the accuracy of large numeric data.

6.      File Lookup à if the validation program has access to master files, then input data can be validated by reference to those files. For example a stock file could be looked up to verify that a given product code exists.

7.      Batch Header Checks a computers will calculate any control totals, which have been manually calculated, and the totals compared. This will include the total number of records in the batch, and any hash totals that have been calculated.