Madam,
If you have memorandum of the articles signed by the both parties, i.e. your parents and relatives and parents of your spouse and his relative, that can be an additional proof to show the extent of gold given by your parents. Generally, in Maharashtra it is termed as Vivah Yadi or Vivah Tharav Yadi, if your have custom in your community to draw such lists, then it can be useful for your. However, as stated by brother Adv. Kapil the custody of the same with your in laws can be proved or inferred through the question put in the cross examination and also through the answers elicited in cross-examination. Similarly, if you have any other evidence or witness to show that the said articles are in custody of your in laws, such evidence or witness can be produced and examined. The mediators in your marriage, who have been party to arrange your marriage can also be examined if they are likely and willing to disclose the truth. Similarly, if correspondence in the form of notices and reply notices between yourself and your spouse regarding the dispute, if there are any admissions or deemed admissions in such correspondence, can also be used. However, there is no straight jacket formula to prove custody, it will depend upon fact and circumstances of each case. More particulars in the form of documents regarding the disputes are necessary to express particular opinion.
Thanks and Regards,
Adv. Amit Anandrao Mahadeshwar