Anyone can write a website, and the internet revolves around copying everyone else's stuff. Instead, you need more reliable sources. Look for sources that cite the quote's origin. This will include the date and context of the quote. For example, has a bunch of quotes, organized chronologically and by source. The Einstein quotes in this post come from that page. is good, too.
If that doesn't work, you could try Google Books. See if the quote appears in a book. If it's a decent book, it'll source the quote. Again, the fact that it appears in some book somewhere with an Einstein attribution isn't very strong evidence unless it also says where the quote came from. If the quote doesn't show up on a credible online source and doesn't show up in a book with documentation, it's a pretty safe bet that it's a fake.
In addition to fake quotes, be on the lookout for quotes taken out of context, especially with regards to religion. Einstein could be described as a deist, but was absolutely not a theist, except in his boyhood. This one's a real quotation:
science without religion is lame, religion without science is blind
but the full context is
Even though the realms of religion and science in themselves are clearly marked off from each other, nevertheless there exist between the two strong reciprocal relationships and dependencies. Though religion may be that which determines the goal, it has, nevertheless, learned from science, in the broadest sense, what means will contribute to the attainment of the goals it has set up. But science can only be created by those who are thoroughly imbued with the aspiration toward truth and understanding. This source of feeling, however, springs from the sphere of religion. To this there also belongs the faith in the possibility that the regulations valid for the world of existence are rational, that is, comprehensible to reason. I cannot conceive of a genuine scientist without that profound faith. The situation may be expressed by an image: science without religion is lame, religion without science is blind.
The Albert Einstein Archives at the Hebrew University of Jerusalem and got a helpful response. See
Out of all those quotes attributed to Einstein which ones are really his? How can you tell? - Quora:
'via Blog this'
"I think abominable deterioration of moral standards is mainly caused by mechanization and depersonalization of our lives - the disastrous side effects of science and technology. Nostra culpa!"