Forgot to include Trade in reciept with my Phone

There is a reason that information is important to include with the device.  When these devices are unpacked, the box isn't always there as a reference for the person inventorying them.  Hopefully you are lucky and everything goes the way it should.  However, don't be surprised if your device arrives at Assurant but the trade-in isn't credited to your account.  Personally, I always scotch tape the in the box slip to the device I am trading in, then bubble wrap it before boxing it.  That way, whether or not the person inventorying them isn't the one who removed it from the box, still has the information needed to ensure I get credit for it.