A letter in which a grandfather denounces his daughter’s decision to disown her son after he came out as gay has gone viral after being posted online.

The letter was posted on the Facebook page of pro-gay clothing brand FCKH8 on Tuesday (October 1st), and has since accumulated over 10,000 ‘likes’ on the site.

In the letter, the unnamed grandfather tells his daughter Christine that the only “shame” in the family is her decision to kick her son out of home after he came out as gay.

Although the post remains unverified, FCKH8 says that the letter is real and that they have contacted the family about the possibility of speaking out publicly.

Read the astonishing letter in full below: