We have 1 BP code as General and we have enabled it as a One Time BP. But while processing the payments from CMG module, I want the checks to be printed in a different name other than the BP description. Any way out in LN 10.4 please?

Regards,

regardless of if it is a good practice or not, you could modify the report script to get the one time supplier name and address from a customized table in the footer before printing the check, also you should modify the Check master to update the proper name of the check created by the account and payment method.

Typically in LN, the one-time BP address name (tccom130.nama) is/should be used as BP name.
Which standard report code are you using for printing checks?