The graphic shows how the system works depending on how you set up your sequential numbering options.

If the Sequential Numbering Profile Option is set to Not Used then system works in the following way: The system does not enforce sequential numbering. It does ensure that any numbers entered are unique, but it does not require the next available number. You cannot enable the Allow Document Override Payables Option. You cannot enter a document category or sequence name.

If the Sequential Numbering Profile Option is set to Partially Used or Always Used, and you use any document category, and you use an Automatic numbering sequence then system works in the following way: Payables automatically assigns the next available voucher number from the sequence. The user cannot enter a voucher number. Payables validates the voucher number for uniqueness and requires the next available number in the sequence.

If the Sequential Numbering Profile Option is set to Partially Used or Always Used, and you use a manual category, and you use a manual numbering sequence then system works in the following way: The user must enter a voucher number from the sequence if a sequence is assigned to the category. A voucher number is required. Payables validates the voucher number for uniqueness but does not require the next available number.