涨房租的30天通知是用regular mail还是Email啊

租户一年到期，跟我说在买房，想Month-to-Month。最近小区HOA涨了50快/mon，我的房租比market低100快，
所以想涨100块钱。这样的话，通知是改用regular mail还是Email?

谢谢

所有跟帖： 

• I used email -xixi2009- ♀ (0 bytes) () 07/17/2013 postreply 11:18:05

• and asked then reply to me to make sure they recived my email -xixi2009- ♀ (0 bytes) () 07/17/2013 postreply 11:18:52

• same way! -SunshineInCA- ♀ (0 bytes) () 07/17/2013 postreply 11:21:03

• Thanks! -elune- ♂ (0 bytes) () 07/17/2013 postreply 12:06:00