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?
Personal Checks. The financial institution redeeming a check determines the expiration date of a personal check. The Uniform Commercial Code permits the accepting institution to decide whether it will redeem checks dated more than six months before the date you take the check to the institution.hecks from the U.S. Treasury are valid for one year after issuance. The U.S Treasury issues checks from the Internal Revenue Service, Social Security Administration and any other federal agency. Payees must contact the paying agency to request a reissued check.