Normally, when you save a document like a Sales Order for the first time, a document number will be automatically created. inFlow allows you to customize these document numbers.

You can customize the document number for a single document by directly changing the document number in an entity. For example, you can change the Order # field for a Sales Order, which also shows as the Invoice number.

Alternatively, you can change the way document numbers will be generated. To do this, open Company Settings from the Settings menu, and then click on the Doc. Numbers tab. There, you can set up how document numbers will be created.

You can set the Prefix and Suffix for a document number type to set what you want to show before and after the main number. You can also set the next number here; future document numbers will be generated starting from here. You can also set the number of leading zeroes here.

Document numbers need to be unique. For instance, you can't have two purchase orders both with Order # PO-000001. In addition, Sales Orders, Invoice w/o Order, and Sales Quotes cannot share document numbers.

Each document number has a maximum length of 16 characters, and the next number cannot be a negative number.