It really matters not one iota what the ZZPS letter says. It will threaten all sorts of gruesome outcomes if the recipient doesn't pay up. So what?
ZZPS are a third party that has nothing to do with the contract allegedly breached by the driver. The only party that the Keeper needs to deal with and take note of is NCP.
**UPDATE**.
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Thank you for all your advice b789, i have followed this to the letter. I submitted my letter exactly as per your draft via the NCP webform, this was sent but frustratingly you do not receive any confirmation email. I couldn't find an email to send it to?
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I subsequently received a letter from ZZPS increasing the amount owed for both of the tickets (remember these were for the same vehicle parked for 3 days in the same space, 1 issued on first day and 1 on third day)
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I have today now received two letter from CGTT Certified Enforcement Agents, one for each of the tickets telling me that if i do not pay or comply within 14 days NCP intend to pursue the matter through the courts.
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As advised i have made no contact with ZZPS.
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Do i need to resend the letter to NCP via registered post? do you have an address or email i could resend it to or is this not necessary? Whilst i'm not overly concerned about the ZZPS and GCTT letters, i'd rather not be receiving them.
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What really frustrates me is that i paid the correct fee on exit and have checked the space where i parked and can see absolutely no infringement whatsoever.