Will Aid Month starts in November and lasts for just four weeks, linking people with participating solicitors in their area who prepare basic wills in exchange for a donation.
But there is a limit on available appointments which are expected to book up fast.
Campaign director Peter de Vena Franks said: ‘Will Aid is now open for business. You can make a November appointment right now and we suggest you do it as soon as possible to avoid disappointment.
‘Will Aid is a wonderful opportunity to not just make a will, but do it with the help of a professional with the added bonus of helping nine charities in the UK at the same time.’
The recommended donation for a basic Will Aid will is £95 for a single will and £150 for a pair of mirror wills.
Find your nearest participating solicitor at willaid.org.uk.