How can I understand replacement front panel is original or not?

Hi everyone,

Front panel of my Samsung Galaxy S3 was broken and I want to buy the replacement one but I saw a lot of front panels at shopping websites. All of them wrote original or OEM but I cannot trust the word. I have to check it when it arrives to me. So, how can I understand a front panel is original or not ? As far as I concerned, Apple's logo is placed on the sockets of their front panel assembly like a pointer of originality. Does Samsung products have any pointer like Apple products for originality test ? In addition, does anyone know a seller who really sells original front panel for Samsung Galaxy S3 ?

Thanks in advance !