In Australia, each electorate has a big book of names and addresses of voters registered there (the 'electoral roll'). You show up, say your name and address, and they strike off the line next to your details. Being struck off this register also constitutes the compulsory part of compulsory voting.

Then you grab your ballot form off the person, wander on over to a booth, mark it as you so desire (formally, informally, a dick drawn on the ballot paper, leaving it blank, a tirade of abuse towards the clowns in the corridors of power, a combination of the above[1], etc.), fold it over, wander to the area with the cardboard boxes for depositing it in, and stroll on out to the BBQ for a democracy snag.

If you are not in your voting area (e.g. you're on holidays on the day), you can vote at any location as they have another, bigger system that lists all of the people outside that electorate. They will print you off the corresponding ballot and then your ballot goes into a second box for collecting the votes of wayward souls who needed to do their civic duty, and those votes are dealt with separately

These boxes containing the completed ballot papers then remain sealed and under formal watch by the Australian Electoral Commission until counting time after polls close that evening. Once counted, they're securely kept for any formal review as required.

Voting only ever occurs on a Saturday. You can also do a postal vote, or pre-polling (going to a reduced set of polling booths before the election day, if you know you're going to be busy).

Many schools, churches, public buildings, etc. are commandeered as voting centres. It is rare to need to queue more than 15 mins. I usually walk in to find maybe 2 people in front of me. Like the French system, this makes tallying the votes a very parallel affair but also means that the barrier to voting is essentially nil. Given the compulsory voting laws, the government is compelled to eliminate all barriers to voting.

You'll note a few things here:

1) Although you register with the AEC, no physical ID is required to vote. The registration process is exceedingly simple, contains minimal data[2], and the government piggy-backs on to various services (e.g. drivers licences) to provide pathways for people to register. For example, I got an address change sticker for my licence today, and the page is 1/3 dedicated to that and 2/3 dedicated to reminding me to update my electoral registration to my new address.

This means you can in theory vote in multiple different polling booths in the same or different electorates. The AEC will scrutinise this and you can be fined if you do it. However, AEC research suggests that it is very low decimal percentages of voters who try to vote multiple times, and most of those that do, do so by accident rather than malice.

For example, in 2010 there were 12.4 million votes (out of 14 million elegible electors). Of that, 16,210 letters were sent to apparent multiple-voters, with 6,254 subsequently noted as clerical errors (i.e. somehow they were marked off twice accidentally). 1,454 people (0.01%) subsequently admitted to voting multiple times, and of that only 19 were referred to the police. Over 80% of multiple-voters were the elderly, new electors confused about the process, or those with language difficulties.

The AEC reviews this each year, and the magnitude of the numbers tends to be the same, and discussion + the above figures can be found here:
https://www.aph.gov.au/About_Parliament/Parliamentary_Depart...

2) You don't actually have to vote. Other countries bemoan our 'compulsory voting' laws, without understanding that you can get your piece of paper and then immediately stroll out and throw it in the bin. It's the getting-your-name-struck-off-the-register part that matters. On balance, this draws people out but gives them the ability to opt out of the democratic process if they're serious about it. This detail is often lost in the debate, I find.

3) It is all paper-based, much like the French process. The AEC employs an army of people each election (most sign up only for that specific election, only a minority are full-time AEC employees) to scrutineer the process. It is supervised and has numerous checks and measures in place. Recounts can happen at the appeal of any party, and will often occur in close races. Being paper-based, there is a relatively immutable physical record that can be scruineered and independently audited. It is a very simple system by design, and that is one of its core strengths.

[1]: the Australian Electoral Commission specifically clarified that a ballot that is legibly formal but ALSO has a dick drawn on it is still counted as a formal vote and will therefore be counted: https://twitter.com/AusElectoralCom/status/37514210996088832...

[2]: The AEC holds name, date of birth and address. They will cross-link with other state and federal systems to send reminders about registration, but otherwise they keep very little data about citizens: https://aec.gov.au/Enrolling_to_vote/About_Electoral_Roll/