diff --git a/.Rbuildignore b/.Rbuildignore
index 1999ac0..de8d0d9 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -26,3 +26,4 @@
 ^vignettes/handling_LOQ_files$
 ^vignettes/handling_LOQ\.bib$
 ^vignettes/optim_warf\.RData$
+^CRAN-RELEASE$
diff --git a/CRAN-RELEASE b/CRAN-RELEASE
new file mode 100644
index 0000000..2e5cee3
--- /dev/null
+++ b/CRAN-RELEASE
@@ -0,0 +1,2 @@
+This package was submitted to CRAN on 2020-06-13.
+Once it is accepted, delete this file and tag the release (commit 1bb9f78e24).