Refunds over 6month+ transactions

Hello! 

I am looking for some insight on what others do in similar situations. I recently had a guest who had to cancel their reservation. Turns out, I was not able to refund the card because the original transaction was 6 months+ or older. I inquired with OwnerRez and they said I would need to provide the guest with a check or Zelle them back the money. I wanted to ask if anyone here has run into a similar situation, and how did you refund the money? All input is appreciated. Thank you for your time ☺️