Many older hotels are plagued by plumbing problems, and flushing of toilet paper and tampons is discouraged. A good clue to follow is if there's a wastebasket very near the toilet, you shouldn't flush the john ribbon.

It can be kind of inconvenient. While the toilet and plumbing may handle the tico paper in small wads, the American stuff can clog things up.
This is typical not only of C.R. and Mexico, but of many places in the world. On a trip to Amsterdam in 2000, we were surprised to encountered a neat little sign in six languages, in our hotel room bathroom, warning not to flush any paper down the toilet. This was at the Krasnapolsky, a once-elegant but aging hotel right on Dam Square. We also found this to be true in Madrid.
Just look for the overflowing garbage can filled with crappy paper...

It's your signal to avoid the Royal Flush.