Back in about 1999 or so...
... before MP3 players were cheap and fairly good, I bought one off some auction website (not eBay but a site that also sold/auctioned off stuff itself)

It stored an hours worth of music and cost me £170 or so (shocking!), but when it arrived it wasn't compatible with my Windows 95 computer. I sent it back and patiently waited for my refund.

The money went into my account a week or so later but instead of creditting me with £170, they accidentally game me £1700.

A typo by some admin person somewhere netter me over £1.5k.

I know at that point I hadn't technically won that, but after 7 years (or something) it was legally mine. So at that point, I felt I won.
(FUXTIX Not my words, Carol, Thu 28 Apr 2011, 23:00, 1 reply)

Legally, but not morally.
And it's 6 years since you last acknowledged in writing a debt, or made a payment that it ceases being enforceable.
(5 in Scotland)
(Though debts to the DWP are forever, if you ever get benefit again, they will take a slice of that to pay it off)
(Student debt and some other wierd classes of debt also have longer periods)
(speedevil, Thu 28 Apr 2011, 23:55, closed)