Is RMA number the same as eBay return ID

I need to return a damaged item and have been issued with rerurn label and package slip by eBay. It asks me to write the return RMA number on the label but despite much Googling, I'm still not sure where to find this. I have a 10-figure 'eBay return ID'. Is that the same thing?

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An RMA is supplied by some sellers so ask your seller.   It will help them connect your returned item with your order details.   But it's not necessary as far as ebay's return system is concerned.