Atleast to my knowledge there is absolutely no provision whereby the pension can be denied if the employee does not nominate anyone or is unable to submit death certificate of spouse. Pension is a right earned by unblemished service.
I shall be grateful if any other expert could enlighten me if I am wrong.
If your fiend is Central Govt employees the relevant extract if CCS(Pension) rules is as under:-
Rule 54 (1) A Government servant shall, on his initial confirmation in a service or post, make a nomination in Form 1 or 2, as may be, as appropriate in the circumstances of the case, conferring on one or more persons the right to receive the 3[retirement gratuity/death gratuity] payable under Rule 50 :
Provided that if at the time of making the nomination -
(i)
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the Government servant has a family, the nomination shall not be in favour of any person or persons other than the members of his family ; or
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(ii)
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the Government servant has no family, the nomination may be made in favour of a person or persons, or a body of individuals, whether incorporated or not.
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Rule 54(14) For the purposes of this rule, -
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(a)
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1[(b)
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"family" in relation to a Government servant means -
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(i)
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wife in the case of a male Government servant, or husband in the case of a female Government servant.
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NOTE 1. - Deleted.
NOTE 2. - Deleted.
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(ia)
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a judicially separated wife or husband, such separation not being granted on the ground of adultery and the person surviving was not held guilty of committing adultery.
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(ii)
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son who has not attained the age of twenty-five years and unmarried daughter who has not attained the age of twenty-five years, including such son and daughter adopted legally ;]
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Rule 53(1) A Government servant shall, on his initial confirmation in a service or post, make a nomination in Form 1 or 2, as may be, as appropriate in the circumstances of the case, conferring on one or more persons the right to receive the 3[retirement gratuity/death gratuity] payable under Rule 50 :
Provided that if at the time of making the nomination -
(i)
|
the Government servant has a family, the nomination shall not be in favour of any person or persons other than the members of his family ; or
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(ii)
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the Government servant has no family, the nomination may be made in favour of a person or persons, or a body of individuals, whether incorporated or not.
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If your friend is state Govt employees there may be parallel provisions. If your wife is employed in central autonomous bodies then most of the bodies borrow these rules of have their parallel rules.