A modern example from Italy (1970's) A paper envelope with printing, containing two 50 Lire stamps. Issued by Autostrada S.p.A.
The tranlation of the text: ci scusiamo dover sopperire con francobolli alla carenze di moneta spicciola. Utillizatali per il pagamente del pedaggie, is we apologize for having to make up for the lack of small money with stamps. Use them for the payment of the toll