Suspended user who get my gift but can't mark recived.

Open a support ticket.

If I'm not mistaken, you're supposed to request a re-roll if the winner of your giveaway is suspended.

It it is temporary suspension wait for his suspension to be removed. If it takes more than 7 days, contact support for a re-roll.

I was in a similar position last week. I won a game, it was sent to me and I used it. When I went to mark it as received here I saw I was suspended. It was for 10 days initially, for honestly forgetting to use a gift I won a while back and another for allegedly regifting when I did not (this was reversed by staff afterwards). So it may be the person has been suspended for 5 days. Have you contacted the winner to find out? The first thing I done was contacted the person to explain, he understood the situation and was happy to wait 5 days as they will still get the value added afterwards.

I was in the same position for almost 2 months, just wait 'till his suspension ends then have him mark it received

Just ask him to mark it as received after the suspension is over. He can do it even after 7 days.

If it's a permaban, maybe you can work something out with support. Support could see that you're telling the truth by checking your giveaways, the person who won your giveaway, and then going to that person's Steam account to see that they actually activated the key.

Ticket. Or wait till suspension over.

If longer than a week, contact support with proof that you gave him the game, and they'll correct your profile.

Ok. Thanks everyone. I contacted the person with suspention. I will wait for suspention to be over and remind him to mark recived. Thanks again. I'm new to steamgifts stuff so I was little worried.