Letter of Consent may now be considered
One of the common reasons for rejection of a trademark application is similarity to a prior mark. In Indonesia, it used to be that even a letter of consent amongst related entities in the same group of companies was not accepted to overcome a citation. The Indonesian Trade Marks Office took the position that this strict approach was necessary to avoid confusion of having similar marks in the name of different entities crowding the register.
Full article: https://www.rouse.com/magazine/news/indonesia-update-on-trade-mark-prosecution-procedures/?tag=indonesia