UK Address Format Guide

What goes in Address Line 2? Learn when to use it for apartment, suite, unit, or floor numbers on checkout forms—and when you should leave it blank.

Address Line 1 is the primary required field on checkout and shipping forms. Learn what to put (street address and house number) with clear visual examples.

What goes in Address Line 1 vs Address Line 2? Clear breakdown: Street address & house number in Line 1; apartment, suite, or unit in Line 2 (or leave blank).

Stuck on a checkout form asking for State or Province? Learn what to enter for countries like the UK, UAE, Pakistan, Singapore, and Romania.

Stuck on a required State field for a country with no states like the UK, Singapore, or UAE? Learn how to fill or bypass mandatory State/Province inputs.

Stuck on City, Suburb, or District fields on international checkout forms? Clear guide on what to enter depending on your country (US, UK, Australia & more).

Confused between billing address and shipping address at checkout? Learn why they differ, when they must match your card, and how to fill them correctly.

Can you enter a PO Box in Address Line 2? Discover when to put PO Box in Line 1 vs Line 2, and why FedEx/UPS reject PO Box deliveries.

Where does the apartment number go? Learn USPS standards for Apt, Suite, Unit, and Floor numbers on envelope labels, Line 1 vs Line 2, and checkout forms.

What does c/o mean in postal addresses? Learn how to format 'care of' on envelopes and shipping checkout forms when sending mail via another recipient.

Struggling with Address Line 1 and Line 2 on Shein, AliExpress, or Amazon checkout? Step-by-step guide with real street, apartment, and package delivery examples.

How to enter a valid US billing address for Apple ID, Google Play, and digital stores. Real street examples, valid ZIP codes, and 0% sales tax states (Delaware, Oregon).

Does Dubai or the UAE have a ZIP code? Learn how to fill mandatory postal code fields for UAE shipping addresses on Amazon, Shein, and DHL.

APO, FPO & DPO Military Addresses in Checkout Forms. Use the exact unit, PSC or CMR and box supplied by the recipient.

W-9 & W-8BEN Address Fields: Residence vs Mailing Address. W-8BEN line 3 must identify your actual tax residence, not a PO Box.

Fix Billing Address Mismatches: AVS, Stripe & PayPal. Check the billing street number and ZIP against the issuer’s current records.

International Shipping Addresses for DHL, FedEx & UPS. Check each field’s actual limit; UPS WorldShip address fields allow 35 characters.

Canadian Addresses & Postal Codes in US Checkout Forms. Use the recipient’s real postal code, not the A1A 1A1 pattern.

Japanese Addresses in English: Romaji & Seven-Digit Postcodes. Use the recipient’s supplied romaji spelling rather than inventing a street name.

Ireland Address Format: Counties, Eircodes & Online Forms. The first three characters are the routing key, not a county abbreviation.

German Addresses: House Numbers, c/o & DHL Packstation. Keep Straße and Hausnummer in that order, including any letter suffix.

Gate Codes, Buzzers & Delivery Notes: Address Line 2 Rules. Keep the unit number in the postal address even when you also give instructions.

Registered Agent vs Business Mailing Address on Forms. Read whether the field requests a registered office, physical location or mailing address.

Saudi National Address & SPL Short Address Format. A Short Address has four letters and four digits. Use your registered SPL details, including district and city.

South Korea: English Road Name Address & 5-Digit Postal Code. Use the current five-digit postcode, retaining leading zeros. Preserve building (-dong) and apartment (-ho) identifiers.

Australia: PO Box, Parcel Locker, State Abbreviations & Postcodes. Write suburb, state abbreviation and four-digit postcode together. A PO Box and a Parcel Locker are different delivery services.

Mexico Address Forms: Colonia, Calle, Exterior/Interior & Código Postal. Calle is the street; número exterior is the building number. Preserve all five postal digits, including leading zeros.

Hong Kong Address Without a Postal Code: Checkout Form Fix. Hong Kong does not operate a local postcode system. 00000 and 999077 are not Hong Kong postal codes.

Italy: Via/Piazza, CAP Postal Code, Comune & Province. Write Via or Piazza, street name, then house number. Use the correct province: examples include RM, MI, NA, TO and FI.

Spain: Calle, Número, Piso, Puerta & Código Postal. Calle is the street and número follows the street name. Put the postcode before the locality on an envelope.

Netherlands: Postcode 1234 AB, House Number & Addition. A postcode has four digits and two uppercase letters. Copy huisnummertoevoeging exactly as registered.

Switzerland: Four-Digit PLZ / NPA / CAP Address Format. PLZ, NPA and CAP are language labels for the postal code. Do not append internal database postcode additions to the label.

What Is a ZIP+4 Code? Nine-Digit ZIPs in Checkout Forms. ZIP+4 has five digits, a hyphen and four more digits. Follow the form’s five-digit or ZIP+4 instructions.

Sources and scope of the institution-backed postcode and locality examples used in the Croatia country and city guides.

Institution and published visitor-address sources for the selected examples.