No mistake, neither questionnable for a player rated in 1000.

I had a game analysed and a 1078 player didn’t do any mistake, neither questionnable moves.

All the games I had analysed so far had such mistakes or questionnable moves, even with ELO higher than 1700.

Is it possible my opponent played such a game?

Yes but it is very hard at that level. I was able to do with a Fool's Mate in the Dutch with 99 accuracy

69 moves in his game...

There is only one game you have played against a player in that range that has 69 moves played. I have no idea why you think he played without mistakes or questionable moves, Because he did play far from perfect. Missed wins, mistakes, inaccuracies, even a blunder. Almost half of the moves were not the best moves. Am I missing something?

The second game you played against the same opponent, he did get a 99%+ score. However you resigned on move 9 so the rating is totally skewed as, after 3 book moves, he only had to play 6 good moves. And every one of them was the most obvious move. Almost any player would get a similar rating against you in that game.

Report it! This has to be judged, the opponent probably used a chess engine. Chess.com will take action if found guilty.

Generally speaking, cheaters dont cheat only on Wednesdays.  Meaning, not too many cheaters will be 1000 rated because they will cheat their way higher.  The number of actual cheaters compared to the number of suspected cheaters is likely 1 in 1000.  Almost every time someone posts a game here, the theory doesn't hold up to discussion.  I think maybe one time I saw a post where there was a legit debate about whether the game was highly suspicious or not.  One time.  

Yeah but we gotta report it right? Only then will some action be taken? Only then we can find out wether he is guilty or not. 

If that was true, why would his rating be this low?? He should be somwhere in the 1800s

Picoleto kids

I hope I was wrong about the cheating on the first game. However, I wasn't interested to compete with the guy, if I was sure in my mind I have played against a computer... so I quit the second game... I do mistakes in life and a lot in chess

Sometimes as well, you get a really high accuracy in a game simply because the opponent played really poorly. nothing suspicious about a high accuracy game on its own.

Thinking like this is why chess.com is clogged with reports and the real cheaters survive.

Weird. I had our first game analysed again with the chess.com software and there is nothing wrong with all my opponent moves reported.

I exported the pgn and had it analysed by the Lichess.org software and there are normal inaccurate moves from my opponents reported.

After all, what I didn't suspect at all, maybe it's only a software issue!

That's what I did and I received a message from chess.com as they took an action against my opponent that remains confidential.

I sent a message to my opponent at first telling him that the software didn't report any inaccurency in his game and that it was the first time against all my opponents. He didn't respond; he might have should.

I donno...

I won without mistakes ;-; i think i played my best game in a tournament 

Yeah that is correct. If I feel a doubt, I take it my responsibility to report a player. Then it is chess.com's decision. I also received the same response. I checked my game archive and found out that the person i reported was banned. That proves that he had done some wrong. Also, I don't send a personal message to them, because they could start taking counter measures. Well I would say

REPORT A GAME IF YOU SUS THEM EVEN A BIT AND TRUST THAT CHESS.COM WON'T BAN THEN UNNECESSARILY AND THAT THEY WILL TAKE APPROPRIATE MEASURES. IF IT WAS ME IN THE GAME MENTIOED IN THE FORUM, I WOULD HAVE REPORTED IT.

How is chess.com supposed to sort out all of your reports?? They already do millions...