"Trevor Wilson" wrote in message
...
On 12/05/2017 10:52 AM, Phil Allison wrote:
Ian Field wrote:

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I found that signing and dating my repairs made it difficult for
customers
to present entirely different items as returns.



** Recording serial numbers is the usual precaution against that one.

Plus recent repair work is generally visible.


**Yup. I had a guy who brought in an NAD amp for service. It was duly
fixed. He brought it back 2 weeks later for an almost identical repair. I
was surprised, so I checked my records and noted that the serial numbers
failed to match. Arsehole.

One of the shops I narrowly avoided doing business with allegedly sent a
printer under warranty back to Epson - when they took it apart, they found
that serial numbers on individual parts were allocated to over a dozen
different printers.