The code used here is a spin on an old classic.
Normally, seeing isn't believing.
When all red and yellow letters are translated from Braille around the border, the plaintext reads: "I was not always a dishonest man after i lost my job at the plant i did not see another way. The fire was a fake and I knew my family would be away. I had a week before my life insurance ended. This was the way to provide for them."
The code is braille, but there's more to it than that.
The stamps may help you filter your information.
One color should be ignored. The other two (?) should not.
Yellow and blue will give you two letters per space. Green is where they overlap.
Consider the theme of the card.
La Sagrada Familia is known for its stained glass...
Holding the card up to a bright light, certain letters from the front are framed in the squares on the back. This plaintext reads: "My name is Antony Araslav."
You'll need excellent, bright light to solve this puzzle.
Sometimes, the answer isn't as opaque as it seems.
The theme (and principles) of this card come into play here, as well.
Orange is where red and yellow overlap.
Reading every other letter forwards, the plaintext is: "This part is merely a small diversion."
So the entire message is mixed except the first and last letters.
There are two sentences here, both running in different directions.