You must be able to prove that you delivered documents on the other party in a manner allowed by the Act. You must complete a certificate of service.
For service on a landlord, a tenant must complete a Certificate of Service on a Landlord. For service on a tenant, or tenants, a landlord must complete either Certificate of Service on a Current Tenant, or a Certificate of Service on a Former Tenant.
As soon as you have served documents upon the other party, you must complete a certificate of service, attach copies of the documents served and deliver the certificate of service and documents to ORT. Failure to promptly file a certificate of service and the attached documents may result in the cancellation of the hearing, particularly if ORT does not receive timely proof that the hearing notice was served. Proof that the hearing notice was served should be delivered to ORT within two days after the last day for proper service of the hearing notice, or the hearing will be cancelled.
Failure to inform the ORT that the hearing notice was served or not served, may mean that your application will be cancelled, and you will have to start over and pay a new application fee.