dont send the original to them they will loose, it ask the company re issuing certificate, for a couple of approved copies, they sign the copies or stamp.
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send one of the copies, ALWAYS keep the original, as long as you have it
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"IF" you need it as part of claim
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worth getting it re certified and a alarm service, i found out one of my sensors was a bit dicky so worth it in the end
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mine was approx
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£30 for reissuing certificate,
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£60 for new sensors, new contact switches and a
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general tidy up from the previous
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"professional" ha installer