There are bodies styling themselves Freemasons which are quasi-Masonic or imitative of Freemasonry and to visit or be associated with any such body is a serious Masonic offence. When travelling abroad if invited to visit a Lodge you should first make sure that the Lodge is one working under the jurisdiction of, or recognised by the Grand Lodge of England. This should be done by communication with Grand Secretary or District Grand Secretary for guidance. Grand Lodges of other Constitutions in amity with the Grand Lodge of England are listed in the Masonic Year Book. Members of the English Constitution should bear in mind that some of these Grand Lodges may recognise other Grand Lodges not in amity with the United Grand Lodge of England. When visiting a Lodge under another constitution it is possible that there could be present, quite legitimately, so far as it is concerned, members of a Constitution not recognised by the English Constitution. Such a situation calls for  tact and diplomacy in  withdrawing without giving offence, bearing in mind that it is part of the duty of members of the English Constitution not to associate Masonically with members of un-recognised Constitutions and that this duty transcends the more apparent calls of courtesy and politeness.