How can I find out if I won a lottery prize?

[Myrtle Hogan-Lance]

There was a guy selling lottery tickets in aid of the Asociación Canaria de Ayuda a Familias Desempleadas y sin Recursos "RIFA SOLIDARIA" in the car park at LIDL today.  Being a trusting soul I bought one.  This is not the first time I have bought such a ticket; a while back they had one in aid of the people who were temporarily displaced because of the pesky volcano in El Hierro.  That ticket had official Red Cross stuff all over it so it was probably legit.

Both tickets referenced the ONCE draw of a particular date.  So the question is, as I am not an aficionado, how do I find out if I won something? 

Alternatively, you may wish to enlighten me if it turns out I am gullible.

[Janet]

Most people think that Once is just a lottery but it's much more than that - see HERE.

To check results, or even buy tickets online, see HERE.