I have received an offer from Amazon verbally and talked to the manager but I haven't received an offer yet. And I know after that once I get it, I have a week to accept it. Now, I have another onsite with Microsoft which is scheduled in mid-October, I am gonna pre-pone it so I can do it before the Amazon deadline expires. But I am afraid to pre-pone it before Amazon sends me an offer. I don't wanna pre-pone it and then Amazon rescind my offer or something and then I screw up Microsoft as well. So my question is how much time does it actually take for Amazon, after the initial letting you know that you have received an offer, to actually sending an offer letter ?