The Spanish law requires placing one mailbox for Postal Service every mailing address

The Spanish Law 43/2010, released on 30th December, rules the universal postal service, the rights of users and the postal industry.

In its article no. 24, the law sets out the conditions for mail distribution and delivery. According to this article, each mailing address must reserve one mailbox slot for mail return.

For further information, see Law 43/2010.