Fair warning they have horrible customer service. But, they should be able to let you know.
It is possible, but to be sure call them at the number they have here or try to see if you can go to the office and speak to one of the people who work here. It might be helpful if you take a photo of her with you and show it to whoever is helping you find her grave. I am very sorry about your loss and I sincerely hope that these suggestions can help you in some way.
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