Look up posts about IC and wellness checks.
@Forever Sleep can also tell you about her experience.
I'm not sure whether people who have purchased SN recently have received welfare checks. That's worth looking into first. I suspect they followed up on the IC purchases because he had been arrested by then in Canada- good international relations and all that. But still, it's probably still possible if a source gets exposed and prosecuted, or if it gets noticed at customs I suppose.
As for what happened to me. Two police officers knocked on my door on a Saturday afternoon. They went to my neighbours first- no idea why but, that wasn't great. They told me they had been tipped off annonymously that I had purchased a suicide kit. Their intelligence was terrible- they clearly hadn't been briefed well at all. I told them I had bought SN.
From then on though, I probably took a more reckless approach than most people. I think a lot of people either deny it, say they've purchased it for meat curing or something or, that they've already disposed of it.
I was expecting the visit and I'd already decided I didn't want to lie. Suicide isn't illegal after all and at that time, I don't think SN was. I'm not sure if it is now- you'd need to check that. It's certainly a controlled substance and they definitely will want to take it away.
I did my best at reasoning though- saying it was for future use in case I come down with a debilitating illness. Which is true- I would use it under those circumstances. But basically- I think if it's clear you can rationalise and you're not in immediate danger, they may back off. I agreed to be put in touch with a helpline which ironically- was a much more distressing experience! I think I'd prefer to have continued speaking to the police! I'm happy to talk more if you want to PM me.
Basically though, I think there are a lot of variables. It's going to depend on who you get I would think- how reasonable they are. Some people had much more intimidating visits. It likely depends on whether you are on their radar already also. Someone with a mental illness history and previous records of attempts is likely to concern them more. Basically, I think it really just comes down to- they don't want to get the blame if you use it immediately. So- someone who seems high risk I imagine they will do more to confiscate it. I just tried to be honest, polite but firm and they let me keep it. But yeah, you may not even get one. I'm not sure everyone who purchases it does. It was more that particular source. It was distressing though to be honest. Worse thing was not being able to tell anyone but people here.