зарегистрироваться в(I am writing to register with your employment agency as a part-time teacher. – Я пишу с целью зарегистрироваться в вашем агентстве по трудоустройству в качестве учителя по совместительству. alexghost)
зарегистрироваться в уполномоченных органах(the sellers and buyers of first sale fish require to be registered with the competent authorities in the Member State concerned. | In the UK nursing, midwifery and AHP students are not renumerated prior to being registered with the competent authorities as they remain ... | A foreigner who is not using the services of accommodation provision as indicated above is obliged to register with the competent authorities (local police ... Alexander Demidov)