Possible scammer? (your thoughts and expertise please)

#1
Hello,

Note: I searched the terms "fraud and scammer" first before posting this question.

I recently opened a new store, and I had an order by the same person 3 times, each time abandoned.
Does this mean it was a possible scammer trying multiple credit cards or something?

Should I just let this one go?

Or follow up by email and ask if they need assistance?

Your experience and thoughts please.
 
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