While it's not mandatory for caregivers to have a training certificate, hiring one with proper training is highly recommended. A certificate can indicate that they have undergone formal education in caregiving standards and practices. This can provide peace of mind about their skills in providing quality care for seniors. It's essential to assess the caregiver's experience and references as well. You may also want to consult with local agencies or the Department of Health for further guidance on caregiver qualifications.