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?
Report Abuse. Cheques go out of date after 6 months, but the bank should still honour it up to 6 years as there is still a legal liability on the debt. If it's a dividend cheque then it's 12 months and a 9 year liability.eport Abuse. Cheques go out of date after 6 months, but the bank should still honour it up to 6 years as there is still a legal liability on the debt. If it's a dividend cheque then it's 12 months and a 9 year liability.