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Every Link in the Collection then opens the same form carrying its own Item’s data, so whoever scans only answers what is actually new.

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Get the entry IDs from Google

You cannot guess them and should not try. In the form, open the three-dot menu, choose Get pre-filled link, type anything into the questions you want pre-filled, then Get link. Google hands you a complete working URL — swap your placeholder values for bindings. usp=pp_url tells Google the URL carries pre-filled values. Each entry.1234567890 is one question, and the number is unique to that question in that form. Several at once, joined by &:

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Bind IDs, not sentences

QRtub inserts the value character for character and does no URL encoding, so a value containing a space, &, ? or # breaks the link. Bind an Item ID, a serial or a code — never a description or a note. If a binding cannot resolve, QRtub drops the Destination rather than opening a malformed form.

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What will not pre-fill

File upload — Google blocks it. And for multiple choice, checkbox and dropdown the value must match one of the form’s own options exactly, including capitalisation; a near miss silently pre-fills nothing.