![If I wrote the recipient's phone number below their address just in case the post office had trouble delivering the letter, would they contact the recipient to pick it up? (U.S. to If I wrote the recipient's phone number below their address just in case the post office had trouble delivering the letter, would they contact the recipient to pick it up? (U.S. to](https://qph.cf2.quoracdn.net/main-qimg-3073051b7539073a68dc021a33a3d447.webp)
If I wrote the recipient's phone number below their address just in case the post office had trouble delivering the letter, would they contact the recipient to pick it up? (U.S. to
![an old vintage post office or postal services signpost on the top of a traditional red gpo post office phone box. English typically British telephone Stock Photo - Alamy an old vintage post office or postal services signpost on the top of a traditional red gpo post office phone box. English typically British telephone Stock Photo - Alamy](https://c8.alamy.com/comp/MB063D/an-old-vintage-post-office-or-postal-services-signpost-on-the-top-of-a-traditional-red-gpo-post-office-phone-box-english-typically-british-telephone-MB063D.jpg)
an old vintage post office or postal services signpost on the top of a traditional red gpo post office phone box. English typically British telephone Stock Photo - Alamy
![GPO / Post office domestic residential telephone from around 1970, with dial. (Phone number on the dial has had a digit deleted Stock Photo - Alamy GPO / Post office domestic residential telephone from around 1970, with dial. (Phone number on the dial has had a digit deleted Stock Photo - Alamy](https://c8.alamy.com/comp/BMKMM2/gpo-post-office-domestic-residential-telephone-from-around-1970-with-BMKMM2.jpg)