The passport sticker that replaces the ROC symbol with a “Republic of Taiwan” image has been rejected by customs in Macau, Singapore and Hong Kong. However the stickers have been considered valid in most Western countries.
The designer of the stickers said on Facebook that the stickers are not meant to change the cover of the passports; rather, they are "an artistic action opposing the Utopian 'Republic of China' system." He accused the amendments drafted by the Ministry of Foreign Affairs to be unconstitutional.
Custom officers will ignore decorations if the information page or chip and bar code of the passport are not falsified or damaged.