Trading in an old phone, I need help with location identifier

Huh?  I am very cell phone savvy, and this makes no sense.  Explain what you're asking? 

Is it possible you are looking for the IMEI number? 

For the shipping label it is asking for the Location identifier

We are here to help you with sending your trade-in device, @sethbstratford.

Thank you, @formerlyknownas for the response. 

Location identifier is normally used for devices you are returning and or exchanging during a BRE(Buyer's Remorse Exchange). 

We want to ensure you were provided with the correct shipping information and label. You can request a new shipping label here with your shipping kit. Just enter your email address you used during check out and your confirmation number. 

You can also call our Trade-In support team at 1-888-445-6005 M-F 7am-7pm CST or
S-S 9am-5pm CST.

If you are unable to get your shipping label resent to you, please let us know so we can meet you in a DM to provide you with that information. 

Clarissa, AT&T Community Specialist