Swiss Post provided return address in case of undelivery.
P.P.: Private Postal
SPI: Swiss Post Identifier
MAD: is probably for Madrid.

It is believed that this is 2013 regional edition for Ibiza.

One sheet has 10 different labels of locations and beaces in Ibiza.

One whole book has 10 sheets.
 

FRONT COVER
 

SWISS POST
Ibiza
2013 0002283 -01-02

The cashier was reluctant to sell the front cover as it is the only cover she has and she needed it for the POS price scanning.
 

BACK COVER
 

ETIQUETA POST PAID DE SWISS POST PARA EL USO EXCLUSIVO DE ENVíO DE CARTAS
Y TARJETA POSTALES A TRAVÉS DE LA RED DE DISTRIBUCIÓN DE SWISS POST.

DEPOSITAR LA CORRESPONDENCIA SOLAMENTE EN BUZONES DE SWISS POST,
NO VALIDO PARA DEPOSITAR EN BUZONES DE CORREOS.

SWISS POST PAID LABEL FOR USE SENDING LETTERS AND POSTCARDS THROUGH
DISTRIBUTION NETWORK SWISS POST.

CORRESPONDENCE DEPOSIT ONLY IN SWISS POST
MAILBOXES, INVALID FOR CORREOS MAILBOXES.

CONTACTO E INFORMATION / CONTACT AND INFORMATION 902 55 04 04

www.swisspost.es

PRIVATE POSTAL OPERATOR

Private postal service is an alternative mailing service provider other than the official country's mail operator.