Government forms
The short answer: get the form from the office that issues it. The longer answer is why hosting copies here would make things worse rather than better.
Birth, marriage and death certificates come from the Local Civil Registry Office, and PSA-authenticated copies come from PSA. Which one you need depends on who is asking. Certificates and vital records.
Application forms are issued by your LGU’s Business Permits and Licensing Office and they vary. Business permits and licences.
Senior citizen, PWD and solo parent IDs are processed by the City or Municipal Social Welfare and Development Office. Social services.
SSS, PhilHealth, Pag-IBIG, DFA and LTO publish their own current forms on their own sites. Those are the ones to use, and they are not your city hall. All services.