Anchor allows you to set a custom invoice prefix, helping you avoid duplicate invoice numbers and personalize how your invoices appear - both in Anchor and Xero.
Why set an invoice prefix?
There are two main reasons:
Customize your invoice numbers
You might want your invoice numbers to reflect your brand, team, or internal naming conventions. Prefixes give you that flexibility and consistency across both systems.
Avoid conflicts with Xero/ QuickBooks Online
If you already have invoices in Xero/ QuickBooks Online, using a unique prefix prevents number collisions when Anchor starts syncing invoices. This ensures smooth integration and avoids duplicate errors.
How to set your invoice prefix
Go to Settings > Business details in your Anchor account
Under Billing settings, enter your desired prefix in the Invoices prefix field
Click Save changes
Once set, all new invoices created in Anchor will start with that prefix and sync into Xero/ QuickBooks Online with the same format.
Example: If your prefix is LUNA, invoice numbers will look like LUNA-0001, LUNA-0002, and so on.