Will the price change between the date of signing the plan and the day of my death? Will my relatives have to pay any additional fees?

Azur Funeral Planning SA plans freeze the costs of supplies and funeral
services. This means there will be no increase in these costs, as long as the plan has been settled in full at the time of death.
On the other hand, third-party services (such as municipal taxes, incineration tax, death announcement in newspapers and flowers) are provisioned at the rate in effect at the time the plan is created. Adjustments may be requested by the family when arranging the funeral.
Rest assured, the largest costs will have already been paid by you. For the most part, adjustments are not very expensive (except for in a rare few cases).