1, explain your purpose: First of all, you need to explain your purpose, that is, why you want to change your surname. This may include close relationship with stepfather, no biological father or other personal reasons.
2. Show your wishes: Next, you need to show your wishes clearly. This means that you understand and accept the consequences of changing your surname and are willing to bear the relevant responsibilities.
3. Confirm the stepfather's consent: At the same time, it is necessary to confirm that the stepfather has agreed to change his surname. This means that the stepfather already knows and agrees with his wishes and is willing to support his decision.
4. Date of signing: Finally, you need to attach your own signature and date to the bottom of the document to ensure the legality and enforceability of the document.
The following is an example of agreeing to change my stepfather's surname: Dear xxx (stepfather's name): I, xxx (my own name), hereby declare that I have voluntarily decided to change my surname to xxx (stepfather's name). This is because I have a very close relationship with my stepfather, who has always been an important figure in my growing up and made great contributions to my education and growth. I fully understand and accept the consequences of changing my surname, and I am willing to bear all relevant responsibilities and obligations. I confirm that my stepfather has known and agreed to my decision and will support me. I hereby sign and confirm that the above contents are true and accurate. Salute, signature: xxx Date: xx, xx, xx.