Hi Ishana,
Just to be complete, I'll say that after posting, no, the invoices would not show up in any Vendor account as with the vendor code left blank the system would have no way of knowing which vendor account they should show up in.
However, I believe that you are asking whether during entry of the MC with a blank vendor ID whether a list of invoices to be paid will show up in the detail grid - no they won't so if the user was truly able to select invoices to be paid and yet the posting journal shows no vendor id for the transaction - then I agree, something went wrong.
Jan 25 is fairly long ago, especially if 2011 is not a typo of the year. If DI is clean and the Vendor account bal is correct, then maybe client is not aware of or remembering the running of a period/year end that may have purged the trans from history. Still, why no Vendor ID in the Check Rec. ??? Hmmm
Maybe you should include the client's complete AP version number for Softrak to have while reviewing this post.