Follow the steps to successfully complete the NI 15A form.

1. Press the ‘Get Form’ button to access the NI 15A form and open it in the online editor.
2. In Section 'A', provide your particulars. Fill in your surname and other names using capital letters. Enter your National Insurance number and consent to submit the follow-up Medical Certificate in Section 'B'.
3. Declare the accuracy of your information by signing the form. If you are unable to sign, a witness may sign in your place and provide their particulars, including name, address, identification, and occupation.
4. Move to Section 'B', which should be completed by your medical practitioner. They will need to certify your condition, updating their examination date, and commenting on the duration of your incapacity to work.
5. Ensure the medical practitioner includes their registration number and office address. They will also need to declare the accuracy of the information provided by signing and stamping the section.
6. Proceed to Section 'C', which must be completed by your employer. They are required to certify your absence from work and indicate whether the absence was due to workplace injuries.
7. Your employer will fill in the daily earnings during sickness, including periods of absence and specify any loss of earnings due to sickness.
8. Once all sections are filled out and declarations made, review the form for accuracy. You may then save your changes, download the form for your records, or print it to submit physically.

Complete your NI 15A form online to ensure a smooth submission process for your sickness benefits.