My bad, I ment ETH.
I used the online wallet Myetherwallet.
The address is: 0x170c9d5638a504a271912a374a27c85a88ed2be9
I copied it and pasted it, so it can't be wrong. (or could it?)
I'll try to contact their support too.
Thanks for your answer
I'm not sure this site is very trustworthy but
https://etherchain.org/account/0x170c9d5638a504a271912a374a27c85a88ed2be9 suggests there are around 200 transactions going into the address and coming from it some of which a transporting less than dust (0 eth).
I think it is possible that your address could be changed by copying and pasting it into the other site, however I think that's quite unlikely for eth as people are generally after stealing BTC (there's a greater market cap so more profit if someone accidently doesn't check the address before sending).
I use a rule of thumb, before sending transactions, to check the firsth 3 and last 3 digits of the address. It'll probably work with electrum (just ignore the 0x as that'll be the same on all of them). It's unlikely an address can be more out than that as, it'd take a high amount of computing power to instantly produce an address that looks that much identical to the original one you wanted to copy into it.
