Adipocere: when a buried body has not decomposed

There is one sentence families never expect during a relocation: “The deceased has not decomposed.” After twenty, thirty, sometimes fifty years in the ground, the body lies almost unchanged. The cause is called adipocere, and it has nothing to do with the coffin or the funeral – it has to do with the soil. Here is what that means for a grave opening, a relocation and a repatriation.

What adipocere is

Adipocere – also known as grave wax or corpse wax – forms when body fat does not break down but converts chemically instead. The fats become a firm, soap-like mass that encloses and preserves the body. In German-speaking Switzerland you will hear the term Fettwachs, and the preserved body itself is called a Wachsleiche.

The process starts early: under the right conditions adipocere forms three to six weeks after burial. Once the mass has formed, it lasts. Adipocere bodies can survive decades and, in extreme cases, more than a hundred years.

One point that matters for families: this is a natural chemical process, not a failure. It reflects nothing about the funeral, the coffin, the funeral director or the person who died.

Why a grave does not decompose

Decomposition is the work of bacteria, and most of them need oxygen. Without oxygen the breakdown stalls and fat conversion takes over instead. Three conditions lead there:

• Heavy clay soil. Clay is dense. Air barely gets in, water barely drains out.
• Standing water. Water that does not seep away effectively seals the grave. Sloping ground, a high water table and compacted paths nearby all make it worse.
• A coffin that is too tight. Heavily varnished or plastic-lined coffins keep air out just as effectively as the soil does.

The sexton of an affected cemetery in the Principality of Liechtenstein described it in exactly those terms to the press in 2016: clay soil, standing water, too little oxygen. Around a dozen bodies there had barely decomposed after more than twenty-five years.

Because the cause lies in the ground, the problem is section by section. Within the same cemetery, one burial section can break down properly while the section next to it does not.

How often this happens in Switzerland

The honest answer: there is no national statistic. Cemeteries are run by the municipalities, and no authority keeps count of how many sections are affected. Anyone quoting you a percentage is not taking it from a source that measures it.

What does exist are documented cases – and they show the scale. The best known comes from Cham in the canton of Zug: when a railway line was built through a closed cemetery in 1994, around 257 adipocere bodies were uncovered, after roughly fifty years in the ground.

In practice: it is not rare, but it is not the rule either. And above all, it can be checked in advance.

What it means when the grave is opened

Legally, adipocere changes nothing. You need the same municipal authorisation as for any other grave opening, the same family consents, the same deadlines.

In practice, several things change:

• The body is largely intact. Transferring remains into a small container, which is possible after full decomposition, is out of the question. The job requires a complete new coffin.
• The weight is considerably higher. Adipocere is heavy and holds water. That determines how many people we need on site and how we arrange the transport.
• The work takes longer. Care comes before speed, and that is not a platitude: what gets damaged once cannot be put right.
• Screening is not optional. In these cases we always work shielded from view and outside visiting hours.

Is a relocation still possible?

Yes. Adipocere is not a bar to a relocation – it is a question of preparation. What changes is the effort involved, not whether the law allows it.

One question matters most: to where? If the relocation stays within the same cemetery, the same soil problem can recur at the new plot. It is worth asking the administration which sections are unproblematic; they know from experience.

If a family grave is the destination, space becomes a factor too: a complete coffin needs more room than transferred remains, and not every family grave has it.

Repatriation abroad

Here the news is better than you might expect. A zinc-lined coffin is mandatory for any repatriation abroad in any case, and the authorities issue the mortuary passport regardless of the condition of the deceased. So nothing changes about the documents.

What does change is the weight. A zinc-lined coffin is already substantial; an adipocere body adds a great deal more. Airlines charge freight by weight and need the figure in advance. We therefore declare a realistic weight before we book anything – a correction at the airport costs both time and money.

For road transport to a neighbouring country or to the Balkans, weight matters less. That is one reason why, with affected graves, we more often recommend the road.

What the municipality can do

For the municipality, adipocere is a concrete problem: a section that does not break down cannot be reallocated once the Ruhefrist – the mandatory rest period – has expired. Two responses are common:

• Extend the rest period. Instead of the usual twenty years or so, the section stays closed for longer. For families that means the grave remains, and a grave clearance comes later than expected.
• Remediate the section. The municipality replaces or aerates the soil so that decomposition resumes. That is the municipality's business, not the family's – but it can close a section for a considerable time.

Both are worth knowing before you plan. A closed or remediated section can push your timetable back by months.

What changes about the cost

The basic structure stays the one set out in our article on the cost of an exhumation. For the work at the grave itself, experience puts it at CHF 3,000 to 4,000. With adipocere, three items move upward:

• Coffin. A complete new coffin becomes unavoidable where a simple transfer of remains would otherwise have sufficed.
• Staff and time. More hands, more hours on site.
• Transport. With air freight, the extra weight feeds straight through.

What does not change: the municipal fees and the documents. And what you get from us in every case is a written quote with each item listed separately – even when we will only know for certain at the graveside what we are dealing with. If the work on site turns out to be heavier than quoted, we stop and speak to you before you incur any cost.

How we handle these cases

Four steps we keep identical on every job:

• Ask first. We enquire with the cemetery administration about the section before anything is planned. It costs nothing and answers the question in most cases.
• Say plainly what is possible. If a section is known to be problematic, you hear it from us before the quote – not on the day of the opening.
• Work shielded. A screen, outside visiting hours, two trained staff.
• Record it in writing. You receive a written record of the relocation – useful for relatives who could not, or chose not to, be there.

A final word on the decision itself: some families stop when they hear that a section is affected. That is entirely legitimate. Nobody has to see a relocation through simply because they started it. A conversation beforehand costs you nothing, and is sometimes the whole answer.