After that moment, I couldn’t trust my own memory anymore.
My family searched the house but found no sign of the postcard.

The mailbox logs showed nothing unusual at the time.
There was no stamp record matching that date either.

Everything pointed to one simple conclusion.
The postcard had never existed physically.

But I still remembered holding it clearly in my hands.
Every detail of the handwriting felt burned into my memory.

Years later, I still think about what I experienced that day.
Whether it was a memory error or something unexplained remains unknown.

Experts often call this false memory or suggestion effects.
But that explanation never fully satisfied me emotionally.

Because I didn’t just “think” I saw it.
I remember reading it line by line.

Even my mother’s reaction made no sense at the time.
She reacted instantly, as if I had seen something impossible.

To this day, I still cannot explain what happened.
And I still wonder if something briefly crossed into my reality and left just as quickly.

What makes it disturbing is not the postcard itself.
It is the certainty that something felt real enough to rewrite my memory forever.