I almost never see any in the 4 versions outlined in the original post. All 4 of these versions are suitable. 1 could argue that they are much more suitable than "Sincerely yours". Any of them can be a refreshing alter from studying yet another American sort letter. In Germany https://corporatelawyerinpakistan66399.oblogation.com/37132628/the-smart-trick-of-corporate-lawyer-in-pakistan-that-nobody-is-discussing