Just asking i only used paysafecards to buy games here and if screenshots of the order page screen are enough in case of losing account due to email losing.
This is just a question i still have no problem with my email or gog account but i have gmail. What gog would sometimes need is to have a backup email or something else. I've read too many times on the gog forums that somebody lost access to account due to losing email.

It's your responsibility to save your GOG emails.

Edit:
In case you haven't stored your GOG emails (why? Oh why?)...there is a second option.

Go to [your account] > [orders & settings] > [orders history]
If you hovver your mouse besides the order# of your games, there is an arrow that opens a drop-down-menu, click on that arrow and choose [view receipt].

There you find an exact copy of your GOG emails in regard to purchases, received gifts and claimed freebies.

A screenshot of these receipts is as good as the real deal (should you ever actually lose access to your account).

Of course - you need to screenshot these receipts BEFORE you lose access...which may take some time, seeing that you have 591 games in your account (one good thing, though: there will be only one summarized receipt, if several games have been bought at the same time).

Edit 2:
Dang, ninja'd by AB2012

XD

I don't think I know of any service that asks for two email adresses in case you lose access to the one you register with. Perhaps those that request a telephone number to validate accounts? (As an aside, imagine the uproar here in the forums if GOG asked for a phone number.)

But if you have Gmail, you can set up different ways to recover your account, including linking another email account (of course you have to do this in advance).

I have several ways to recover my gmail. Don't think it would happen that i wouldn't use it for 2 years and lose my gmail. Anyway i took like 5 or maybe 6 screenshots of the order and settings page under orders history so i wonder if that is also good for recovery incase of losing email and then using a new one

Forget about screenshots:-

Hover over your username -> Orders & Settings -> Click on the Down Arrow on a game -> Click "View Receipt" -> Save as PDF.

You don't need to do this with every game but if you keep half a dozen receipts (oldest and newest games purchased + a few at random) with your Username, Order Number & Date of Purchase clearly shown on them, that will go a long way in providing proof you're the owner for Account Reclamation purposes. If you paid via PayPal, then download matching Paypal receipts (because they also contain the GOG Order Number) and provides extra proof that someone logging into your GOG account can't see. A screenshot simply showing pictures of games means far less to GOG than order codes & dates that can be cross-referenced on their billing system at their end.

I don't have the option save as pdf when i right click. Do i need to download adobe acrobat reader or something?
Also i saved the screenshots before without the direct receipt as order history also contains order numbers, price and date and which game and also my username is at the top.

You can't download as PDF's, only "View Receipt", but it's a feature of many web browsers to save a page as a PDF file (or install a PDF printer). If it's got all that information then it might be good enough. It's just that each individual game page has the words "Please also note that this email message serves as your receipt" which is always good to have on proof of purchase.

Okay thanks for the answers.