If you don't have a card that allows that, you can also buy a prepaid card, though I believe such cards may have distinctive numbers and it's possible a vendor may disallow.

I use https://privacy.com/ for this.

One of the best discoveries I found on hn a few years ago

They are the best. They're big issue used to be that they gave out _debit_ numbers, which a lot of things would not accept. But, this year they transitioned to credit, so even that problem has gone away.

Thank you. Never knew about this service, was looking, obviously not hard enough, for exactly this. But really do think they should advertise better. This would help with managing expenses too.

I had to sit on a waiting list for a few weeks to get invited to it about 1 year ago. I don’t know what that was all about but it seems they aren’t in a rush for more users.

Btw their numbers don’t work with Adobe, but I used Privacy for a Microsoft Office trial about 6 months ago and I got an email every time Microsoft attempted to charge me, which was approximately once/week before I just deleted that card.

Looks like it’s US-only.

I haven’t been able to find a service like this that supports Australian users, so looking for suggestions!

wise also offer virtual cards, which works in NZ, possibly in Aussie too? https://wise.com/nz/virtual-card/

I'm in NZ, but I can use https://statescard.com/ and they seem to be pretty good.

I use this for signing up to watch HBO Max and some other subscriptions. It's pretty handy.

The “personal” plan is free. I’m always cautious with free things that use my personal data - if you're not paying for the product, you are the product.

How are they able to keep this free?

Like any credit card company, they charge fees to the vendor. Something like 1.5%+$0.30 of every transaction. It even says on their website,

> we make money from the interchange paid by merchants

I don’t use it for everything. Only things I want to place a limit on. The data can’t be worth very much.

Sadly it is only available to US residents :(

Thanks for the pointer!

Yeah, I wanted to sign up for Oracle's free cloud, I tried a pre-paid credit card and it was disallowed.

Patreon, for example, will not accept a pre-paid card.

I use Privacy with Patreon. It works great.

How do you do that?

About 6-8 years ago, all major credit card companies in US has the virtual CC service: BoA, Citi, Chase, you name it. Passing one period, they all started to shut down the service, saving Citi.

I don't know why Citi still has this service, and seems to keep developing it (it used to be a Flash page, and since Flash is out commissioned, they rewrote the whole service into HTML).

So if you are in US, get a Citi CC or something like privacy.com.

Does citi let you create any no. of virtual numbers and can you set limits for them ? I sorely miss the BoA flash feature and haven't found a replacement. I would sign for citi if it's the same.

I just tried generating 5 numbers without problem. It seems you can generate as many as you want.

You can set expiration time and daily spending limit for the numbers. Also optionally assign a name for each number.

Note that I have two Citi CC but only one card has this service. So some card may not. The one available to me is the double cash card.

Not sure about the US but in Europe there is Revolut that allows you to create virtual credit card numbers tied to your main account. They can be deleted/disposed of at any time in the app.