What should I do if the police don't inform me that the bail period is up?

Legal analysis: Then go to the Public Security Bureau yourself. The longest period of bail pending trial is one year, and the termination formalities shall be handled after the expiration. The police may be negligent and should take the initiative to ask. According to the relevant regulations, if bail is about to expire, the executing organ shall notify the decision-making organ in writing fifteen days before the expiration of the time limit, and the decision-making organ shall make a decision to lift bail or change compulsory measures, and notify the executing organ in writing before the expiration of the time limit.

Legal basis: Article 73 of the Criminal Procedure Law of People's Republic of China (PRC). If a criminal suspect or defendant did not violate the provisions of Article 71 of this Law during the period of obtaining a guarantor pending trial, he shall, after the completion of obtaining a guarantor pending trial, go to the bank to collect the returned deposit with the notice of obtaining a guarantor pending trial or relevant legal documents.