I'm interested in peoples view on serial scammers.

Today I recieved a message 58 minutes after courier left package on doorstep "I did not receive the parcel I would like a full refund and I would like another sent to me". (this is MFN)

I assuming this is a scam because (1) Requesting full refund and another one is typical move to maximize their return (2) The package wasn't late, no reference to order being delivered, I think they picked it up off doorstep and went about messaging me for a return. You would think they would wait a few days before saying they haven't recieved it.

Regardless of the above is a scam or not I was curious on what everyones thoughts are on if individuals continuosly raise A-Z claims, does Amazon track individuals who make multiple claims ? do they blacklist these people or will they allow them to make as many claims as they wish.

The product in question is low value (£13), so assume these individuals go the route of hoping companies like myself just give refund, no questions asked for quiet life and write it off as wastage because we don't want an A-Z claim against us - the counter argument would be these individuals may want to save their A-Z claims for something of value (in hundreds) - so I'm curious if I genuine scammers would always go the A-Z route for low value items.