I hate to say this but whenever you relocate that is your decision. The company isn't really in any obligations to keep you or pay your move back unless you pre-negotiate that either with a signing bonus or as a clause in your contract. Generally a relocation is offset with a signing bonus and higher salary which is why the risk is worth it, but never doubt that it's a risk you have to take. I know because I've done it myself before, moving countries and all.