Tesa w/out batch

Hello there, I just received tesa from a vendor (in the vendor list) supposedly legit and trusted. The 3 vials came with no indication of any batch. Is it normal ? Prior to the purchase I asked them to provide a COA, which they did, but relative to another known vendor, stating that they are partnered with another vendor, so label may be different. I believe I cannot post the names. How can I be sure that the COA refers to the same batch they sent me ??