Regarding my father's pension

No. Your father's pension will be given up to 23Rd May only and thereafter no pension will be paid.

you visit the bank and submit death certificate of father. 

After the death of your father the family pension of your mother will start.  It will be her own pension.

Since the family pension account is joint the pensioncredited till death can be withdrawn by her.

Hi, Thanks for the info sir. Can she withdraw this month's pension? 

Yes. And your mother shall sumit application in proforma with your father's death certificate and the legal heir certificate to the AG through your father's office.

bank is authroised to receive death certificate of pensioner and start family pension.  AG office only isses PPO which contians details of family pensioner.  Check whether such details are theri in PPO or missing.

If the bank is advised of the death of your father with death certificate his pension will be immediately stopped. Pension upto 23rd of May will be credited to his account. Was he a central government servant? If so there is a provision to add the name of your mother as a joint holder when your father was alive. If he had done that, your mother can claim the amount as the surviving holder. If he had not done that, there is also a provision to enter the name of a nominee as in the case of any other bank account. If he had done that, the nominee can claim any balance in the account. Your mother is eligible for family pension if your father had entered her name in the pension document. Application for family pension will have to be separately made.

donot get misguided.

Visit the bank first with you mlother, death certificate of father and her ID proof.. 

Pension account is also joing (either or survivor) with the spouse.

The identity of the family pensioner is mentioed on the PPO (pension Payment Order).  It is 10 minutes job of the bank. They will credit full pension upto date of death and credit family pnesion hereaferr.  excess credited wil be deleted.   It is their routine job and you are nto the first or the last customer coming for this job.

The copy of the PPO is available in bank as well as pensioner.  In case the PPO is not cpomplete to this aspect then bak will tell you na donly then you need to worry..