> For the complete documentation index, see [llms.txt](https://daisychain.gitbook.io/help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://daisychain.gitbook.io/help/managing-data/standard-fields.md). # Standard Fields Standard headers found in the template file (available [here](https://go.daisychain.app/uploads/people.csv) and in Step One of the [CSV Import Wizard](https://help.daisychain.app/daisychain-csv-imports)). Alternative header names will be auto-matched by our importer — see the table below for more details. Note that you do not need to include *all* of the fields below when uploading a CSV file. The minimal requirement for successful CSV upload is email address and/or phone number.

Field Name	Accepted Inputs	Notes
First Name	first_name, firstname, FirstName, First Name, first name, fname, FName, First
Last Name	last_name, lastname, LastName, Last Name, last name, lname, LName, Last
Email	email, Email, email_address, emailaddress, EmailAddress, email address, Email Address
Phone Number	phone_number, phonenumber, PhoneNumber, phone number, Phone Number, phone, Phone, Cell Phone, cell_phone, cellphone, CellPhone, cell phone, mobile, Mobile, Mobile Phone, mobile_phone, mobilephone, MobilePhone, mobile phone
Email Opt-In	email_opt_in, emailoptin, EmailOptIn, email opt in	Values for this field must be "TRUE" to ensure a person can receive emails through Daisychain.
Email Opt-Out	email_opt_out, emailoptout, EmailOptOut, email opt out
SMS Opt-In	sms_opt_in, smsoptin, SmsOptIn, sms opt in	A "TRUE" value here is only required for sms_opt_in if you plan to send texts from phone numbers that have strict opt-in requirements, such as short codes or phone numbers outside of the US. For standard 10DLC long codes or toll-free numbers in the United States, a contact can still be texted as long as they are Textable, even if sms_opt_in is not "TRUE."
SMS Opt-Out	sms_opt_out, smsoptout, SmsOptOut, sms opt out	This field indicates whether the person has explicitly opted out of receiving SMS messages.
Post Office Box	post_office_box, postofficebox, PostOfficeBox, post office box
Street Address	street_address, streetaddress, StreetAddress, street address, Street Address, address, Address
Postal Code	postal_code, postalcode, PostalCode, postal code, zip_code, zipcode, ZipCode, zip code, Zip Code, Zip, zip	Also known as a ZIP code or post code.
Extended Address	extended_address, extendedaddress, ExtendedAddress, extended address	Often known as "line two" of an address.
City	locality, Locality, City, Town, city, town
State/Region	region, Region, State, state, province, Province	State, province, or region. Values for this field should be two or three letters, following the ISO 3166 standard. In the United States, use the two letter abbreviation for the state.
Country	country, Country	Values for this field should be two letters. If you're unsure of the right two-letter country code, please reference the List of ISO 3166 country codes, and look for the Alpha-2 column.
Tags	tags, Tags, tag, Tag	Values for this field should be lowercase and without any spaces -- any spaces in tags should be replaced by dashes. Multiple tags can included in a single column, separated by commas. Tags need to first be created in Daisychain before they can be added with a CSV upload.