Mary Austin, CCO
Eileen Mckenzie, LMFT
Updated: November 22nd, 2025
A Psychiatric Service Dog letter (PSD Letter) is a formal document written by a licensed mental health professional (LMHP) or doctor. This letter is not to be confused with an Emotional Support Animal Letter (ESA Letter).
This letter proves two things:
- You have a disability (a mental health condition like severe anxiety or PTSD).
- Your trained dog is needed to help you manage that disability.
It is very important to know that the the “PSD letter” is specifically for verifying a mental disability and the medical necessity for a task-trained Service Dog. It is not used for Service Dogs mitigating physical disabilities, but having one for a PSD is highly recommended for housing, as it simplifies the process of making a reasonable accommodation request.
- How is a PSD different from an ESA? (Clear Comparison)
- Simple Steps to Get Your PSD Letter
- Step 1: Psychiatric Service Dog Training
- Step 2: Complete An Online Examination
- Step 3: Get Your PSD Letter!
- Why This Letter is Essential
- What is the main difference between a PSD and an ESA?
- Q: Does my dog need a vest or ID card to be a PSD?
- Q: What questions can a store or business ask me about my PSD?
- Q: Does a PSD letter expire?
- Q: Can I get my PSD letter immediately after applying?
How is a PSD different from an ESA? (Clear Comparison)
Both dogs help your mental health, but their legal rights are different.
Remember: A PSD must be trained and an ESA does not. Also, only a dog can be a PSD, while most pets can be an ESA but no other pet except a dog can be a PSD. A letter proves your need for the dog, but your dog must know how to help you.
Simple Steps to Get Your PSD Letter
This is an easy three-step process:
Step 1: Psychiatric Service Dog Training
First, you will answer a few questions about your mental health and how your dog is trained to help you. This part is private and protected by HIPAA laws. When it comes to training, there are no requirements, it just needs to be individualized and support your mental health disability. You can even seek outside help if you need help training your dog, institutions such as the Certified Dog Training Institute can help you. For example you may want to ensure your service dog trainer is properly licensed and an expert. So, a trainer such as Sarah Wilson, CPDT-KA Lead Dog Trainer who holds the CPDT-KA certification (Certified Professional Dog Trainer – Knowledge Assessed) would be someone you would want to reach out to for help with training your dog. This service dog certification is a respected national certification in the USA offered by the Certification Council for Professional Dog Trainers (CCPDT).
Step 2: Complete An Online Examination
Remember, anyone with a qualifying mental health disability can qualify for a PSD Letter. You can get your letter from any licensed mental health professional, it can even be a local one. You will want to ensure you are properly examined by a mental health expert, however. Based on your examination, your local LMHP or any organization that has such providers like Emotional Pet Support, will match you with a doctor or therapist licensed in your state. You will talk to them to confirm your health needs and how your trained dog helps you manage your symptoms.
Step 3: Get Your PSD Letter!
If the doctor or therapist approves, they will sign and email your official PSD recommendation letter to you right away. The letter is on their official letterhead and is legally compliant.
Why This Letter is Essential
While both require a doctor’s note, Psychiatric Service Dogs (PSDs) have broad rights under the law to go with their handler to all public places, including businesses and transit. Emotional Support Animals (ESAs) are mainly covered by housing laws, allowing them to live with you. ESAs do not have the same guaranteed right to public access or to fly in the airplane cabin for free under the Air Carrier Access Act (ACAA). So, while it may not seem like it, it is important to remember the difference between a PSD and ESA.
“The human-animal bond is a unique, evolving, and growing bond between animals and owners,”
— Dr. Rena Carlson, Veterinarian, 2024-2025 Past President of the AVMA (American Veterinary Medical Association)
What is the main difference between a PSD and an ESA?
A: The biggest difference is training and access. A PSD is trained to perform a specific job (a task) that helps with your mental health disability. Because of this training, a PSD has the right to go almost anywhere the public can, like stores and restaurants. An Emotional Support Animal (ESA) is not trained for a specific task and is mainly approved just for housing. PSDs can travel on board airplanes with the owner as well.
Q: Does my dog need a vest or ID card to be a PSD?
A: No. Legally, your dog does not need a vest, PSD or ESA ID card, PSD/ESA Certificate, or registration to be a service dog. These items are sold online but are not required by the Americans with Disabilities Act (ADA). The only legal thing you need is a professional letter confirming your disability and need for the dog’s trained tasks.
Q: What questions can a store or business ask me about my PSD?
A: To protect your privacy, staff can only ask you two questions:
- Is the dog required because of a disability?
- What work or task has the dog been trained to perform?
They cannot ask about the nature of your disability, require documentation, or ask the dog to demonstrate its task.
Q: Does a PSD letter expire?
A: There is no federal law that sets an expiration date for the letter. However, housing providers and travel companies often prefer documentation that is no older than one year. Renewing your letter yearly is considered best practice to confirm you still have a strong relationship with your licensed mental health professional.
Q: Can I get my PSD letter immediately after applying?
A: Our process is fast, but it requires a consultation with a licensed professional to ensure everything is done correctly and legally. In addition, your dog may need to demonstrate a basic level of training to ensure it meets the requirements to be a PSD. You will receive your letter immediately after your licensed doctor or therapist has completed the required evaluation and approved your request.
Hey, Reader! Did you know, that according to UC Davis Health, over 60% of dog owners meet the recommended weekly amount of exercise?