"Attention Thieves: Please carry ID so we can notify next of kin” (or “Burglars please carry ID so we can notify next of kin") is a sign that has been printed on many images. The warning is that thieves will be shot dead.

“Attention Thieves: Please carry ID so we can notify next of kin” was posted on Twitter by viøłєηŧ fєммє on September 8, 2012.

“Burglar warning sign: ‘Attention burglars! Please carry ID so we can notify your next of kin.’ Fair warning, and seems reasonable to me” was posted on Twitter by Julian Constance on April 19, 2013. “Burglars Please Carry ID #Funny Gun Sign http://gapbagap.in/?p=5300” was posted on Twitter by GapBaGap on October 5, 2016.


Twitter
viøłєηŧ fєммє
@troublewinks
Attention Thieves: Please carry ID so we can notify next of kin.
3:02 PM · Sep 8, 2012·Twitter Web Client

Twitter
Starlightcrow
@starlightcrow
Attention Thieves...Please carry ID so we can notify next of kin. #SecondAmendment http://pinterest.com/pin/184436547211426539/
1:19 AM · Nov 28, 2012·Pinterest

Twitter
Julian Constance
@umvikeli
Burglar warning sign: “Attention burglars! Please carry ID so we can notify your next of kin.” Fair warning, and seems reasonable to me.
8:25 AM · Apr 19, 2013·Twitter for BlackBerry®

Twitter
Dale Now❌ #COVFEFE
@Dbargen
BURGLARS: Please carry ID! RT
@Aundria_Hamby: https://pic.twitter.com/txpa71MwJP #NRA
@NRANews
12:21 AM · Jun 9, 2013·Echofon

Daily Maverick (South Africa)
Serve, Protect (and Shoot): Facebook page offers glimpse into SAPS culture
By Rebecca Davis• 12 June 2014
(...)
The site’s profile picture is a mocked-up warning sign, with an image of a gun, which reads: “ATTENTION THIEVES. PLEASE CARRY ID SO WE CAN NOTIFY NEXT OF KIN”. The implication is that thieves caught should expect to die.

Twitter
GapBaGap
@GapBaGap
Burglars Please Carry ID #Funny Gun Sign http://gapbagap.in/?p=5300
12:40 PM · Oct 5, 2016·Twitter Web Client

Twitter
David
@davidthomas38
Burglars Please Carry ID Funny Gun Sign Garage Humorous Metal or Plastic | eBay http://pinterest.com/pin/166211042477982154/
10:36 AM · Oct 13, 2016·Pinterest

Twitter
David Snellen
@DavidSnellen
Handmade “Attention Thieves - Please Carry ID So We Can Notify Next of Kin” Hanging https://etsy.com/listing/510836921/handmade-attention-thieves-please-carry?utm_source=around.io&utm_medium=twitter&utm_campaign=around.io #byhandbyme
8:01 AM · Sep 29, 2017·Around.io

Alaska Star (Anchorage, AK)
Eagle River residents want to fight back against crime
Tuesday, May 1, 2018 - 17:41
By: Matt Tunseth
(...)
To make her point, Reinbold brought two signs from home, holding them up for the crowd.

“My Alarm Tells Me You’re In My House/My Gun Tells Me Not For Long,” read one.

The other was even less subtle:

“ATTENTION Burglars Please Carry ID So We Can Notify Next of Kin.”

Twitter
Thomas Slupske
@thomasslupske
TomsTHOT: Warning sign on my house, “Burglars please carry ID so I can notify your next of kin.”
8:40 AM · May 21, 2019·Facebook