本人两个月前签了一份工作offer letter,定于九月初上班,目前已经填了一些paperwork,还有体检,backgroud check等. 但现在又收到另一个工作offer,比第一个条件更好,所以我很想接受第二个工作。我可不可以悔掉第一份offer letter?我签的第一份工作的offer letter上面说是"At-Will Eemployment", "this document does not constitute a contract of employment. Rather, it simply outlines certain complensation and benefits arrangements for you while employed by XXX. You will be employed as an at-will employee, which means you or XXX have the right to terminate your employment at any time, for any reason, with or without notice or cause. "
请问签了这样的offer letter,也办了一些手续(他们有我的个人信息如 SSN, date of birth, address等等 ), 现在又想告诉他们我不去了,会有什么后果?