Hello, Brandon I did try it but it is not that issue. I need to have the login name as this SMA_JB_## ... something like this: username+GlobalID. The fieldworker must be identified with his username and the number of the record (GlobalID). How can I solve this? In this case the Natural Park Ranger uses the name of his Park and his name?s initials. When he found a injuried bird he must put a tag like this in the box to deliver to the veterinary: SMA_JB_3. I send you a screensaver of the form for the desired field and the xlsform. Thanks for your help. JLDoria
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