1)Section 60(g) CPC contain exempts the following amounts from attachment:-
"stipends and gratuities allowed to pensioners of the Government (or of a local authority or of any other employer), or payable out of any service family pension fund notified in the Official Gazette by (the Central Government or the State Government) in this behalf, and political pension;"
2)
Section 11 of the Pensions Act reads thus:-
"Exemption of pension from attachment- --No pension granted or continued by Government on political considerations, or on account of past services or present infirmities or as a compassionate allowance."
3) Sections 3 and 4 of the Provident Funds Act protects the provident fund deposit from being assigned or charged and shall not be liable to attachment under any decree or order of any civil, revenue or criminal court. Section 10(2) of the Employees' Provident Funds & Miscellaneous Provisions Act is as follows:-
"Any amount standing to the credit of a member in the Fund or of an exempted employee in a provident fund at the time of his death and payable to his nominee under the Scheme or the rules of the provident fund shall, subject to any deduction authorised by the said Scheme or rules, vest in the nominee and shall be free from any debt or other liability incurred by the deceased or the nominee before the death of the member of the exempted employee (and shall also not be liable to attachment under any decree or order of any court.)"
4) your uncle can file application before CAT to direct PSu to release his provident fund and pension dues