And if you do so you can be sued. There is no registry for service animals.

Q35. Do apartments, mobile home parks, and other residential properties have to comply with the ADA?

A. The ADA applies to housing programs administered by state and local governments, such as public housing authorities, and by places of public accommodation, such as public and private universities.  In addition, the Fair Housing Act applies to virtually all types of housing, both public and privately-owned, including housing covered by the ADA.  Under the Fair Housing Act, housing providers are obligated to permit, as a reasonable accommodation, the use of animals that work, provide assistance, or perform tasks that benefit persons with a disabilities, or provide emotional support to alleviate a symptom or effect of a disability.  For information about these Fair Housing Act requirements see HUD’s Notice on Service Animals and Assistance Animals for People with Disabilities in Housing and HUD-funded Programs.