How to create a form for entering indicators without authorization?

Question

1C-Bitrix

A "list of PUs" (metering devices) is attached to the transaction, the readings of which must be updated every month. The data is entered in the list "indications PU". I would like customers to enter this data themselves. I want to attach additional details to each transaction - a unique transaction ID. The client is sent an email with the address of the page for entering readings and the transaction ID. The client follows the link without logging in, enters the transaction ID in the input field on the page, after which the fields with the names of the PU and the input of the PU indicators for this particular transaction appear below. The client enters the readings, clicks save and the data flies to the "PU readings" list. Maybe there are links to examples of how to implement such functionality?

Answer 1

Just use transaction update via API .
1. Make an interface for entering readings
2. Give the client a link in which the unique code assigned by you is passed as a parameter (you can use md5 from the deal id)
3. The client enters the readings, check the data - update the deal.
Everything is quite simply described in the documentation. If you need a code example specifically for your portal, fields, I will be happy to help.