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Notion Invoice has a default invoice number sequence that is used for all invoices.

However, you can also set invoice sequence numbers and/or prefixes to be specific to each client. This will require you to add a couple of optional properties to the clients database.

Client-specific invoice number

To have a client-specific invoice sequence number, add the following property to your clients database (our starter template already has this property, so there’s no need to add it if you’re using the starter template).

Every time an invoice is created for the client, its “Next invoice number” property will be automatically updated by Notion Invoice.

Client-specific invoice Number prefix

To have a client-specific invoice number prefix, add the following property too (our starter template already has this property, so there’s no need to add it if you’re using the starter template).

<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/af7595bf-dff1-4a58-93f1-87737ea871b6/warning.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/af7595bf-dff1-4a58-93f1-87737ea871b6/warning.png" width="40px" /> IMPORTANT: The property names have to be written exactly as above.

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Example

You have a client named “Worldwide Travel” and you want the next invoice to this client to have the following invoice number: WWT12345. Here’s how you would set it in your client database in Notion: