In GeoNetwork 3.4, the default format for Metadata information "Contact" is the American Format i.e. street, nummer, city, Postal Code, Country
Rue Vautier 29, Bruxelles, 1000, Belgium
However in Europe (in Belgium at least) it should be:
Rue Vautier 29, 1000 Bruxelles, Belgium
Otherwise the address is not valid. Do you know how to modify that?
The metadata files are harvested on a regular basis from a WAF so I can't (and don't want to) hard-code it.
Here is an example of a MD file