1 Professionally dispensed kits from a dentist's office designed to be used at home typically cost $100-$500, depending on the location and dentist. 2  Take-home whitening kits include custom-made trays and typically use a stronger bleaching agent than over-the-counter systems.
... NewsGroupQuestion wrote: How long is a UK cheque 'valid' i.e. how long can a person keep a cheque before presenting it to their bank and still have it honoured? Conventionally, six months.Some cheques have earlier expiries explicitly written on them.ow long is a UK Cheque 'valid'? I hope this is the right group to ask this question..... How long is a UK cheque 'valid' i.e. how long can a person keep a cheque. before presenting it to their bank and still have it honoured?
Best Answer: a cheque is valid for 6 months from the date written on the cheque. It has been known for some banks not to check the date though !But becuase it is only valid for 6 months once written, you would have some comeback with the bank. Cheques unwritten have no expiry. I know this because i used to work for a banking group which was an umbrella for 3 banks. It was the same for all of them.ut becuase it is only valid for 6 months once written, you would have some comeback with the bank. Cheques unwritten have no expiry. I know this because i used to work for a banking group which was an umbrella for 3 banks.