What president added in god we trust to US money?

Answer 1

"In God We Trust" was adopted as the official motto of the US in 1956. The idea of putting the phrase on U.S. currency was conceived by Salmon P. Chase, the US Treasury Secretary under President Abraham Lincoln. Chase wrote in an 1861 letter to James Pollock, the Director of the Mint in Philadelphia, that "no nation can be strong except in the strength of God, or safe except in His defense. The trust of our people in God should be declared on our national coins."

MoreThe motto first appeared on the two-cent coin introduced in 1864. It was added to several other denominations in 1866, following the end of the Civil War, but it wasn't until 1938 that it appeared on all circulating denominations.

The motto wasn't added to paper money until 1957, though. It was placed on the reverse of the 1957 series of $1 silver certificates. 1935-G $1 bills were still being printed at that time so it was added to that series in mid-production; some have the motto and some don't. It was added to higher denominations starting with the 1963 issues.

Some people mistakenly believe that older bills without the motto are printing errors. In fact they're not mistakes and aren't worth any extra premium because they lack the wording.