But the need to seek the NSW Supreme Court's advice about how to spend the funds also demonstrates how tricky things can become when large amounts of money are involved.

As someone who researches the regulation of philanthropy and the not-for-profit sector, the episode is both a lesson in reading the fine print and the need for simpler donations laws.

But it should not deter public-spirited celebrities from fundraising in the future.

The summer bushfires saw an outpouring of generosity, with Australians donating vast sums towards various charities and causes.

Barber has family on the NSW South Coast, which was badly hit by the fires. The well-known comedian responded by setting up a Facebook fundraiser.

The beneficiary was the Trustee for NSW Rural Fire Service (RFS) and Brigades Donation Fund and the target was to raise $30,000.

The fundraiser went viral and saw millions of dollars pour in from around the world. As donations skyrocketed, Barber told her fans via Instagram she planned to spread the money raised around: "I'm going to make sure that Victoria gets some, that South Australia gets some, also families of people who have died in these fires, the wildlife."

Ultimately, Barber raised more than $51 million from about 1.3 million donors. Facebook's fundraising partner, PayPal Giving Fund, then passed the money on to the NSW RFS donation fund.

But spending the money was not straightforward.

The RFS donation fund is governed by a "trust deed", which limits what it can use donations for. This means it can only spend funds received on equipment, training and resources or administrative costs for RFS brigades.

It does not allow donations to be passed on to fire services in other states or to other charities.

Given Barber's comments about how the donations should be distributed and the intense attention on the issue, the RFS sought the advice of the NSW Supreme Court.

On Monday, the court handed down its decision, and depending on your perspective, it's a mix of good and bad news.

On the one hand, the court confirmed that donations can't be passed on to fire services in other states or to other charities.

But it found funds can be spent to support rural firefighters injured while firefighting and the families of rural firefighters killed while firefighting. The funds can also be spent on physical and mental health training, as well as trauma counselling.

The effect of the court's decision is that the funds will stay with the RFS, where they will no doubt be used for important purposes.

But the decision may disappoint some donors, who thought the money would be able to be used to help the broader response to the bushfires. That includes supporting relief and rebuilding efforts in communities devastated by the fires, or helping injured wildlife.

The decision did flag that individual donors could bring their own court case if they believed the funds they donated here not being used for the purposes they were donated for. But this is unlikely - if you've donated $25, then you may not want to spend lots of time and expense pursuing a court case.

The NSW Parliament could pass legislation to broaden the purposes for which the donation fund can spend donations. And NSW Greens MP David Shoebridge has proposed a bill to do just that.

But NSW's Coalition government is unlikely to back a Greens-sponsored bill.

The main lesson is that if you're setting up a fundraiser, or looking to donate to a particular charity, do some due diligence first.

For example, the national charities regulator, the Australian Charities and Not-for-profits Commission has a free public register where you can look up information about individual charities.

To be fair to Barber, she did only intend to raise $30,000 for the RFS, and only expressed a desire to broaden the beneficiaries of her fundraiser when it took off.

But it's important to read the fine print and to understand what you can and can't do as part of a fundraiser.

The episode also shows us that the laws governing charities and philanthropy in Australia are complex.

If the federal government introduced simpler laws to regulate "deductible gift recipients" (organisations that can receive tax deductible donations), then it's likely the problem with Barber's fundraising would have been easier to resolve.

This is because the activities of organisations wouldn't need to be as tightly confined as they are currently required to be.

In a short statement on Monday, Barber noted: "turns out that studying acting at university does not make me a lawmaker".

Some people may think the court's involvement means we should leave fundraising to the professionals, and that celebrity fundraisers do more harm than good. I disagree.

One of the powerful aspects of philanthropy is that anybody can see an area of need, donate money and rally others to do so.

That is something we should encourage. Whilst it's important to do due diligence, celebrities can play an important role by using their platform to promote giving.

Barber's bushfire fundraiser was a powerful example of this, and we shouldn't let the legal issues detract from it.