My father passed away june 5. He received his cpp and oas Today. The government was notified and I even received a oas t 4 slip for oas. Am I going to have to send this back.

Most likely the money will need to be returned, unfortunately, due to the arrival date, despite your notification of the government.

Jean's advice is excellent, as always.

Hello, Nina -

My condolences on the passing away of your father.

Fixya.com receives questions from people from all over the world. I hope I am correct in guess that your father was a Canadian citizen. If so . . .

I suggest you contact the Canadian Pension Plan directly (by phone will be best) and speak with a real person and ask your questions.

See the CPP contact information here:
https://www.canada.ca/en/employment-social-development/corporate/contact/cpp.html

Note: Fixya.com is a website intended for asking and answering questions on how to go about repairing things. Personal opinion: For your kind a question, I think it is best to contact the appropriate agency directly.

I am answering from the USA.

Best wishes.