You can write a review if:
You bought something - that is, you purchased a product or service, or
Your ordered something - you placed an order with the business or company you’re reviewing, or
You can show that you used the services - you have not bought or ordered anything, but you can otherwise document your use of the business or company’s services.
Save a photo or copy of documentation that shows you’ve had a buying or service experience in case there’s a question about your review after you’ve posted it.