Written Souvenirs That Are Sent Without Envelopes

This page is the CodyCross answer for the clue below from Trip to Spain, Group 857, Puzzle 4 (Isabel Pantoja).

Question is: Written Souvenirs That Are Sent Without Envelopes

and the answer is: POSTCARDS

Word Meaning:

POSTCARDS — plural of postcard

Definitions from Wiktionary.