Why passing values from one to another form is not working properly?

I am trying to get one form to pre-populate identical fields in a second form, following the submission of the first form.

The second form is accessed from the first form's thank you link.  I understand how fields can be pre-populated by using the structure '&name_of_field=xxx' method, but cannot work out the 'xxx' bit.

My thank you page link in my first form is:

https://eu.jotform.com/71223687384361?&outlineTravel121=&disembarkation=&methodOf=&input124=

The 4 field names in the first form have identical field names in the second form.

Clearly I cannot know what someone will enter in the first form's fields, so how should the pre-population link on the first form's thank you URL be configured to autofill the second form?

Thanks

I checked your forms and I was able to create an URL that worked.

Since I cloned both forms the below URL should work for you as it is:

https://eu.jotform.com/71223687384361?outlineTravel121={outlineTravel121}&disembarkation={disembarkation}&methodOf={methodOf}&input124[first]={name:first}&input124[last]={name:last}

So just copy and paste it in the Thank you page.

I tested and all fields are transferring fine.

You can test my form as well: https://form.jotformpro.com/71225452792962

Feel free to submit it.

Also here is a useful link about how to pass data from one to another form https://www.jotform.com/help/351-How-to-Automatically-Pass-Form-Data-to-Another-Form

If you have any additional questions please let us know.

Thank you!