How do you contact people who won giveaways?

It also gives you the email address of the winner, so you can always message them that way.

The majority of the ones that don't claimed the win after 3 days+ are autojoiner accounts.
Do yourself something good and don't waste so much time to try to get them to the point to please please please take the win.

Write them here on sg, in one of their old GAs.
When they don't take the win till the 7 days are over, then delete/edit the key + make a reroll ticket with the link to the message you wrote the winner on sg. When a new winner is choosen, then copy/edit the key back in. Problem solved.

I don't. They get message to claim game. My effort ends at doing giveaways. Haven't had yet problem with winner faol activate in 7 days. But noticed some bot users even on high levels, which are online 24/7, but reedem key in the last hours.
When it is bigger game which I have to gift at steam, I mark it on giveaway description. Haven't faced yet person failing add me, but when they won't, lose for them as they won't recieve game.

There's a robust correlation between SG level and responsiveness. That's one of the reasons I stopped doing public giveaways below level 2 as a minimum. I rarely have to wait more than 24 hours until the winner claims his gift.

When I have such a problem I usually meditate and with the help of Guru Tugginmypudha I contact the winner through the astral plane. The trick is optimal butt chakra stimulation beforehand.

Theoretically, you could send a message in one of his old giveaways.
But if he doesn't pay attention to one of the flashing icons in the top right corner, it doesn't make any difference whether it's a win, a message under one of his giweaways or a new chat system.

i've just had to leave a message on a 6 year old giveaway to try and contact a winner

Just be patient, he has 7 days to activate and mark as received.
I know it sucks and sometimes it feels like the winner doesn't care, but I try not to think anything of it. Specially because I have taken a day or 2 to activate a win. Once I was traveling and didn't have my pc with me. And recently I won a HB monthly game and I took a whole day to activate it simply because I was still pondering if I was going to buy that bundle. If I had decided to buy it, I was gonna ask the creator to reroll their ga. Once I decided against purchasing it, I activated the game, marked as received and thanked the creator.
After that time, then you should try everything possible to contact the winner. If you fail just open a ticket with support. They will help you in any way they can.

Sometimes, when the winner didn't responds to Steam friend request or ignores it, I used to create meaningless trade offer and describe what I want from the person in attached message. It always worked for now.

Some people are just .... for lack of a better word .... @%^$#%& heads! (your choice on what word to use)

One of my early giveaways was a Steam Gift, the winner was drawn and minutes later I sent the gift via Steam ... at the time they would receive an email about it, etc. The giveaway description clearly stated it was a Steam Gift, etc, blah blah.

1 day goes by and nothing ...
2 days go by and both Steam and SG say they haven't logged on for 3 days.
3 days go by and they log in but don't claim gift or mark received.
4 days and still nothing so I add them on Steam and message on SG by commenting on a previous post they did.
5 days and they are idle again.
6 days go by, they have been on Steam and SG but gift still unclaimed.
7 days and I am about to withdraw the gift sent (not sure if you can still do it but back then you could reclaim the gift sent it the person didn't claim it) and ask for a reroll ... I am like 20 seconds away from doing this when all of a sudden they accept my friend request on Steam and message me:
"yo bro were my game I won. I been wating 7 dayz for it" (not exact words but close to it).
My jaw nearly touched the ground ... I was so tempted to continue clicking, reclaim the gift and ask for a reroll.
Instead I did the "right" thing and told them "I emailed it 7 days ago, did you not check your email".
A few minutes later I got a reply "got it" .... no thanks, no sorry, in fact the @%#$&^ never even played the game.

Unfriended the @#%&^, blocked him on Steam, blacklisted on SG ... wish I did reclaim and reroll but am content that I acted mature in the situation.

Sometimes no matter what you do, you get one of "those" people (no that isn't a racist remark ... you know what I mean).

Leaving a message on one of their giveaways explaining the situation with a link to your giveaway they won is what I recommend. This will give them a notification they'll see and often times either respond to your comment or take care of their win. Remember they have 7 days to claim it so if it's before that it's best to wait.

I still don't understand why it's on the GA creators plate to contact winner if they just stay away. I think we should be able to get an auto re-roll on request (same as GA deletion works before it ends) as long as the key remains unseen after 7 days have past.
But as it is as it is, here's what I do:

1. Find one of the winners old GA's, message him there. Write one clear message and copy it. Post it on several of his old GA's, it will usually get their attention.
2. On the winners page there is an e-mail. Send same message there.
3. Lastly I go to Steam. Yup, friend request, message on profile, yada yada - it's a hassle.

Don't forget to screenshot everything, you'll need it for the re-roll request if you need to do one.

One relatively easy solution is writing to them here, on SG, under one of their old GAs, because they surely get notified by it. Well, they should get the win notification by the system anyway, but it cant hurt to remind them. Otherwise you should try to get one of their contacts that are directly or indirectly linked to their SG profile (Steam or E-mail for eg). I'd think stalking within reasonable limits wont make you a straight up...

View attached image.

I usually wait for their response first before revealing key :) If they don't respond by saying thank you or anything like that, i will let them wait 6 days and on the 7th day I will reveal the key and then blacklist them, because if you aren't thankful, you don't deserve it. I know its a harsh and probably weird way of doing it, but I don't really care :D .. I prefer that the winners of my giveaways are thankful for what they receive for free.

EDIT: It seems people didnt understand me fully, I write my giveaway rules in the description of each giveaway, I dont expect people to KNOW automatically that I want a thank you before I send the key, but I do expect people to read.

I had the same problem with one of my giveaways in the past. I just suspect them to be either a bot or use autojoiner script since they never goes offline on sg whenever i checked on them, so i didnt do much besides sending the key and waiting for 7 days. It got rerolled at the 7th day without problem. The mods accept you sending the key as a proof of contacting the winner, so you dont have to be obligated to reach them to their steam account or email if you think that the winner is like that too.

Last time I had this problem it turned out the person was using SteamGifts mainly on their phone and it was a typical case of "I'll have to check do that later at the pc"->forgot... I dropped them a reminder on an old GA of theirs and they reacted fairly fast.

Other then that I have done a lot of chatting on steam and a bit via email with my winners but that was mainly in the days before there was a enter keys on steamgifts so they HAD to talk to me anyway ;-)

1º Steamgifts sends an email to the winner notifying him.
2º After winning the draw, the winner has 7 days to respond, if after this time they do not answer, you must reroll
3º In case the winner sees the key of the won game and does not answer as if he had received it, you should contact him via mail or visit his steam profile and if he has a public profile and enabled to write comments, leave him one and notify him that please accept that you have received the gift.
4º In case you receive it and winner dont accept that you have received it and you get in touch via mail or steam and he/she dont do it either, open a support ticket on steam and report the user so that an administrator can help you.

Personally, I didn't have great problems with the giveaways, only on two times, one of the winners saw the key but didn't notify me as received and I had to contact him by writing to his steam profile and within hours he accepted it, and on another occasion a winner spent a week and did not enter steamgifts, so I had to reroll, but if they do not answer, contact steam support and they will help you.

I have added them on steam with comment on profile, screenshot, or review, when it came down to that.
If they don't respond in 7 days i request reroll.

Whenever I do a GA, I just reveal the key when it ends. From there, it's out of my hands. It could remain unactivated/unseen for a month and I don't think I'd bother raising a ticket to reroll

How giveaways are handled reminds me of ancient Chinese philosophy although I think SG does it unintentional. Although winners are notified on the site and by email people giving away games are somehow responsible to contact the winners to gracefully accept the gift and can count their blessings when the win is taken finally.

How is that a rational approach? By entering a giveaway you implicitly show interest to receive the gift. If you aren't excited after you won so be it. Let an automatic re-roll decide a new winner after the seven days waiting period.
Of course there will always be cases where real life prevents winners from accepting the gift but then a missed win on SG should be the least of their problems.

if u cant comment on his profile, try on any review/screenshot/video he posted