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Continue to ChatQuery : Tracking users between sites using contact forms I have two websites; A and B. I have hyperlinked linked these sites via advertisement banners and have contact forms on both. When people contact https://vmapp.org/query/137063/Tracking-Users-Between-Sites-Using-Contact-Forms-I-Have-Two-Websites-A-And-B-I-Have-Hyperlinked-Linked-These-Sites-Via-Advertisement-Banners-And-Have-Contact-Forms-On-Both-When-People-Contact/