The Accounts Receivable invoice task doesn't advance the invoice number

An earlier invoice used the prefilled invoice number. Sage doesn't allow duplicate invoices.

You can continue issuing your invoices without error, but Sage will change the invoice number to the next available number instead.

We recommend that when you need to re-enter invoices, use invoice numbers with fewer digits than the current invoice numbering scheme. Do this to avoid interrupting the default sequence.

Confirm if it's a duplicate invoice number

1. Go to Accounts Receivable, Inquiry, Entries, Transactions.
2. Select the Current file.
3. Select the Active file.
4. Create a condition for Invoice Equal to xx (where xx is the invoice number you want to use).
5. If the invoice number already exists, choose an option below.

Use a different invoice number

Change the invoice number so it doesn't duplicate the invoice ID. For example, increment the number by 1 digit.

Update settings to allow duplicate invoices

Allowing duplicate invoices can make reconciliation and/or corrections difficult. We recommend using the next available number instead.

1. Go to Accounts Receivable, AR Settings, Entry Settings.
2. Check the box for Allow duplicate invoices.
3. Click OK twice to save the setting changes.