Danish postal addresses follow a specific bottom-up format (per PostNord). Correct layout:
Recipient Name
Street Name + House Number [+ Floor + Door if applicable]
POSTCODE (4 digits) + CITY (in CAPS)
DENMARK (country name in English or French, on last line)
Mette Hansen
Strandvejen 45, 2. th
2900 HELLERUP
DENMARK
PostNord's address validator ensures deliverability.