Got a legal notice from the lawyer of my video store for 11.00 $ outstanding ?

My video store closed shop andn three year later I recieve this notice of payment for 11.00 $ . The letter is from a lawyer representing the video store. The video store in the past has made no attempts to contact or inform of such a outstanding payment. I am not even sure if this is a valid claim. i ignored the notice the first time thinking of it as a scam and then recived a second one for 41 $ two weeks late with 30 $ as admin fee for the lawyer., I do not want to spoil my credt rating on thius isssue but also do not awnt ot get stuck with a scamster. Any suggestions or help would be great

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