House numbers and address line 2

House numbers belong in address line 1, together with the street. That is what carriers and address databases expect. But reality is messier, so here is how AddressHero handles the edge cases.

The setting: "Allow house number in address line 2"

Some customers put their house number in address line 2, often because of browser autofill. With this setting active, such addresses are considered valid and the order is not flagged or put on hold.

Our clear recommendation: keep it off

We advise against relying on address line 2 for house numbers, and against adding a separate mandatory house-number field to your checkout:

• Carriers and sorting systems read the street line (address line 1). A house number hidden in line 2 or a custom field is a frequent cause of failed deliveries and ERP mix-ups.
• Extra fields create new error sources. If your theme or a form app added a separate house-number field, we recommend removing it and letting AddressHero enforce a complete address line 1 instead.

Also note: whether your checkout shows address line 2 at all is a Shopify checkout setting, not an AddressHero option.

House number ends up in the wrong field in your ERP?

If corrected orders show the house number in the wrong field downstream (for example in the Adresszusatz in your ERP), the cause is usually another tool rewriting the address AFTER our correction. A real case: Shopify Marketplace Connect removed the house number we had corrected and moved it to address line 2. The fix was disabling the address manipulation in that tool.

Checklist for this symptom:

1. Open the order in Shopify and check the timeline: what did the address look like right after AddressHero's correction?
2. If it was correct in Shopify and wrong in the ERP, check apps that touch addresses (marketplace connectors, ERP sync apps) and your ERP's field mapping.
3. Still stuck? Contact us via support with the order number, we can tell you exactly what we wrote and when.