In civil proceedings, documents are generally expected to be filed along with the affidavit in evidence of the witness. If a party files additional documents at the stage of cross-examination, the court normally examines whether those documents were previously in the party’s possession and whether sufficient reasons exist for the late filing.
If the documents were not filed earlier without proper explanation, the opposite party can certainly raise an objection and request the court not to exhibit them. However, the court still has discretionary power to allow such documents if it believes they are necessary for proper adjudication of the matter, usually after giving the other side an opportunity to respond or cross-examine regarding those documents.
Therefore, your objection that the documents were not filed along with the affidavit is valid from a procedural standpoint, but the final decision will depend on the court’s discretion and whether the defendant can justify the delay.
On a side note, in many documentation matters outside litigation for example when students submit academic records for programs like MBBS in Russia through education consultancies such as Education Vibes authorities also insist that all required documents be submitted together initially to avoid procedural complications later. The principle of submitting documents at the correct stage applies in many formal processes.
You may request the court to record your objection formally and seek an opportunity to examine the authenticity and relevance of those documents before they are marked as exhibits