Is this recent?  The first thing you should do is have your cat examined for
a medical problem.  Inappropriate urination is often a sign of cystitis or
bladder infection (especially if it is recent).  Next, have there been any
changes in your household that might cause behavior problems -- new
additions to the household, new furniture (or even cleaning that might
retain certain scents), newly adopted cat, etc.?  If so, it might be helpful
to place Feliway diffusers in the house.  And, of course, how old is your
cat?  Has the cat ever used a litter box?  Please provide more details to
help us, but above all, please have your cat examined by a veterinarian.

MaryL

Photos of Duffy and Holly (pictorial history of my blind cat Duffy's
integration into our household):
Duffy, Part I: The Introduction -- http://tinyurl.com/8y54
Duffy, Part II: Life at Home -- http://tinyurl.com/8y56

The first step is a vet appt. to check for a UTI.   If that's what's causing
it, a course or two of antibiotics will clear up the problem.

Cathy

--
"Staccato signals of constant information..."
("The Boy in the Bubble")  Paul Simon

have you had it to the vet to check for Urinary problems?