Can the groom deliver khutbat an-nikaah and write his own marriage contract?
Question

                Can a Bridegroom deliver his own Khutbah Nikah himself and write the Nikah Contract and make eejab himself in presence of wali/family members?

Is there any example of this in traditions(Ahadith) or anywhere?
Praise be to Allah.
    Saying khutbat an-nikaah before doing the 
    marriage contract is Sunnah, because of the report narrated by Ibn Mas‘ood 
    (may Allah be pleased with him), who said: The Messenger of Allah (blessings 
    and peace of Allah be upon him) taught us to say tashahhud in the prayer and 
    tashahhud in al-haajah… 

    Narrated by at-Tirmidhi (1105) and an-Nasaa’i 
    (3225). Classed as saheeh by al-Albaani in Mishkaat al-Masaabeeh, no. 
    3149 

    See also the answer to question no.
    88130 

    Secondly: 

    There is nothing wrong with the groom 
    himself doing that khutbah. 

    Ibn Battaal (may Allah have mercy on him) 
    said: The majority of scholars regarded it as mustahabb to say this khutbah 
    in weddings. Maalik said: This is a long-established practice, and the 
    shorter it is the better. Ibn Habeeb said: They used to regard it as 
    mustahabb for the suitor to praise Allah and send blessings upon His 
    Prophet, then propose to the woman.

    End quote from Sharh al-Bukhaari 
    (13/260) 

    Ibn Qudaamah (may Allah have mercy on him) 
    said: It is mustahabb for the groom or someone else to give a speech before 
    the proposal and acceptance, then the marriage contract is done after that. 

    It is mustahabb to recite the khutbah of 
    ‘Abdullah ibn Mas‘ood, who said:

    The Messenger of Allah (blessings and 
    peace of Allah be upon him) taught us say tashahhud in the prayer and 
    tashahhud in al-haajah …  

    End quote from al-Mughni (7/62) 

    As there is nothing wrong with the groom 
    himself delivering khutbat an-nikaah, similarly there is nothing wrong with 
    him directly addressing the guardian of the bride, so that the proposal and 
    acceptance are exchanged: the proposal from the guardian and the acceptance 
    from the groom. In fact this is the original format, and there is only a 
    need for someone to do the marriage contract or to prompt the words because 
    many people are ignorant of such matters and have little knowledge of the 
    Sunnah in this regard. 

    As-Saawi (may Allah have mercy on him) 
    said: 

    “It is recommended to give a speech” – 
    with a rhyme and rhythm to it, starting with praise of Allah and the twin 
    declaration of faith, including a verse in which there is the command to 
    fear Allah, and mention of the purpose of the occasion.

    “when proposing” i.e., when proposing 
    marriage. 

    There should be “another speech when doing 
    the marriage contract.” But the one who is to give the speech first when 
    proposing is the suitor, who should say, after praising Allah and reciting 
    the twin declaration of faith: To proceed: our aim is to join you and be 
    your in-laws and part of your family – or words to that effect. 

    Then the guardian should say, after 
    praising Allah: To proceed: we have accepted you and your proposal, and have 
    accepted you as one of our family – or words to that effect. 

    The one who should give the speech first 
    when doing the marriage contract is the guardian, who should say: To 
    proceed: I give my daughter [or the woman who appointed me as her proxy], So 
    and so [mentioning her by name] in marriage to you, in return for a mahr of 
    such and such. After that, the groom says: I have accepted your giving her 
    in marriage to me. The proxy of the groom says: I accept her marriage to the 
    one whose proxy I am. 

    End quote from Haashiyat as-Saawi ‘ala 
    ash-Sharh as-Sagheer (2/338) 

    With regard to writing the official 
    documents, the only purpose behind that is documenting what has happened and 
    guaranteeing people’s rights. Whoever does this registration of the 
    marriage, it does not matter, and that has no impact on the validity or 
    otherwise of the contract. 

    For more information, please see the 
    answer to question no. 104662

    And Allah knows best.