My family, who is insured by the medical system for elder senior citizens, has died. What kind of procedure is required?

If the insured person of the latter-stage medical care system dies, it is necessary to return the identification of the latter-stage medical care insured person, and 50,000 yen will be paid as "funeral expenses" to those who performed the funeral (mourner). Will be
After submitting a notification of death, please go to the ward office Insurance and Pension Division National Health Insurance Section of the ward where the deceased lived.

・Insurance card of the deceased insured (elderly medical care insured card)
・Mourner private seal (using vermilion)
・Documents confirming the name of the mourner and the date of the funeral (funeral receipt, funeral note, etc.)
・Bank's bankbook or account number

Insurance and Pension Division National Health Insurance Section, ward office of the ward where the deceased lived.
Contact information

Kanagawa Prefecture Senior Citizens' Medical Association Insurance Card (enrollment / return) (outside site)
Kanagawa Prefecture Senior Citizens' Medical Wide Area Union Funeral Expenses (outside site)

How do I apply for funeral expenses in the medical system for elder senior citizens?
I lost the payment decision letter (postcard) for the medical system for elder senior citizens. Can I reissue it?