If a Catholic goes to Mass on Saturday evening, and then finds they have reason to attend Mass again on Sunday, can they receive Communion on both occasions?
These links should explain the restrictions on how many times Communion may be received in one day. The first answers your question directly and the following four are clarifications for specific situations. If you have any further questions or concerns that are not answered by these links, please contact Catholic Answers directly.
*]Are Catholics only allowed one Mass per day?**
]* Does a Communion service count as a Mass when receiving twice in a day?**
]* Is it permissible to receive Holy Communion at both a Sunday Vigil and a Sunday Mass?**
]* Is it OK to receive communion at the Saturday vigil Mass and again twice on Sunday?**
]* May I receive Holy Communion three times in one day?**