Is App specific shared secret required to validate receipt for consumable product?

Hey

My team is building consumable product. But i have found two different information from apple doc that it is only required for validating auto renewable product receipt. Does that mean I don't need to validate consumable product at all? Does this increase security if we include a shared secret to our request when verifying receipts?

Is App specific shared secret required to validate receipt for consumable product?
 
 
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